Yz125 needle jet.

Not to happy. (Low RPM) and the needle and clip position is really more halfish throttle. Or they are Nov 25, 2008 · Your best bet is the JD Jetting Guide. ) Adjust gearing to suit your riding conditions. Tried leaner pilot, bog when cracking the throttle. Universal Carburetor Jet Kit by A-Bax Yamaha's all-new 2022 YZ125 two-stroke might be much improved from the 2021 model, but it can always be made better. They are 2 different things. Stock: 45 pilot / 43-73 needle on clip 3 / 430 main / 2. After GYTR jetting and the APEX SX dome the bike will have lots of bottom end and responsiveness, you may be able to drop a tooth on the rear. I don't know if there is a conection. The carb isnt stock, it is a tmx38. 75mm) = 0. Apr 20, 2009 · Needle: Stock position (clip in middle groove) Main: 400. Main Jet 410 2003 Pilot Jet 40 Needle STOCK Clip Position 3RD Air Screw 2 out Main Jet 410 2002 Pilot Jet 30 Needle STOCK Clip Position 3RD Air Screw 1. Photos By Trevor Hunter . 5 slide Schnikey used a 62 pilot, 165 main jet and a Yamaha Y3 needle, which can be bought through Pro Circuit, Nov 4, 2023 · A quick video of the YZ125 JD Jetting Kit - JDY020 going into my 2024 Yamaha YZ125 50th Anniversary Edition. My current jetting - #178 main, #52 pilot, #45 powerjet, NYDF-3 needle, air screw 2 turns out. 5 or 35 pilot jet. Nov 9, 2014 · Looking to reduce and ideally eliminate a bad spooge issue on a friend's 2002 YZ125 and seeking some advice on a good needle and pilot jet combo. If the bike runs good when your pinning it, (revs out good and holds strong power) don't worry about the main jet. I have a 2003 YZ125 that is strictly trail riden and I would foul a plug occasionally. Nov 18, 2021 · 2015 YAMAHA YZ250 JETTING Main Jet: 178 Pilot Jet: 50 Needle: N3EW Clip: 2nd from top Air screw: 1 turn stock Notes: The 2013-14 YZ250 jetting is on the edge–albeit the good side of the edge May 30, 2022 · the stock settings are: #40 pilot jet , 42-74 needle / 3rd clip, #410 main jet Your 43-74 needle suggest you may have a later model bike (2011-2021) with the long stock silencer. Worn reeds will mimic rich jetting, and worn rings will mimic lean jetting. Home Needle shim most Mikuni 2. ” Apr 21, 2009 · Just bought my son a 1998 YZ125, it's at a buddies and I haven't gotten a good look at the carb mounting. Jan 20, 2020 · The factory 2009-2010 YZ125 jetting specs are known to be almost spot-on perfect for motocross track riding in 70-80°F. I can tell just by looking that those are incorrect for my YZ125, (duh!), so I'll buy the correct needle, main jet, and pilot jet to get started with my YZ125. Major bog in the middle. Jul 18, 2022 · I heard the rave about the pro circuit jetting and the y4/y3 needle but they are sold out everywhere. as of right now what are you guys running on your bike (22-24 yz125)? im at around sea level and temps are in the 80s rn for southern Ontario. Going up in . So, to tackle the bog, should I concentrate on the air screw or needle? Thanks! Aug 13, 2023 · Aftermarket carb kit jets and needles IMO adds unwanted variables, well known not to always flow as they are labelled at. Any tips or suggestions would be great, thanks! current jetting: 170m. 5mm of fuel above the float bowl mating surface when the carb is removed from engine and held vertically. ). Jan 21, 2002 · YZ 125 needle I fitted the MXA "super sekret" needle that is been touted as manna. Clutch control and balance are fundamental techniques needed to ride with control and speed. Edited April 22, 2020 by mlatour Link to comment 2020 Yamaha YZ125 Carburetor Jets & Needles. Aug 30, 2023 · 2018 yz 125 sputters or responds poorly to a quarter throttle. I would like a recommendation if anyone has any ideas or new findings. Our test riders had a blast on Carburetor Jets & Needles. I can't remember exactly how it had it listed in the owners manual. to/2MQm5 Oct 16, 2022 · Today, I loaded up the truck and headed to the track for some testing and fun. if you have any jetting recommendations it would be appreciated. It will also not idle well, depending on which jet circuits are too rich. All other jetting was stock, as per MXA, needle leanest position. Please remember that sometimes the stock OEM jetting will work just fine, other times you may have to make an adjustment, so use our suggestions below as a guide to help with your jetting problem. Can anyone remember, or has the original needle jet number for an 01 YZ125? I've got one I'm rebuilding for a friend that looks like its been worked on with a hammer. Is it a carb jetting, or other issue? 2005 yz125 stock So far: New OEM top end (cylinder, piston, rings, seals) but only makin Oct 28, 2006 · Pull up the spring until it is fully compressed. (later 2011+ YZ125 got a longer silencer, a one-half clip richer needle and, a #430 main jet) sea level, 68°F ambient temp, 30:1 premix air screw 2-1/4 turns out # 40 pilot jet 4mm cutaway throttle slide Nov 20, 2021 · Stock jetting - confirmed that my bike came with this jetting. Jun 26, 2003 · I have the same bike. Apr 1, 2008 · With the stock pipe and reeds, stock jetting was very good (410 main and 40 pilot with stock needle). Biggest mistake people do is changing a . It's been trail ridden by a novice girl, so a little bit of spooge is expected, and she is riding in the high desert at around 1500 ft asl. Seems like guys are running big pilot with smaller main like Yamaha calls for. and pretty sure that the settings for the 2011-15 models are: #40 pilot jet, 6BFY43-74 needle, #430 main jet The 2011-15 stock needle 6BFY43-74 is the 'half clip richer' optional needle from the 2006-2010 models, Apr 29, 2020 · On the Yamaha, you should be right around a 48/50 pilot jet, with a 180 main jet, and the CCL needle in the #3 clip position. 080mm versus your TX125 : S-7 needle jet (2. The jetting is weird on this bike. In the OEM parts fiche, a #35 is listed as stock and only richer power jets as optional (40, 45, 50, 55, 60) Mar 30, 2020 · i have a 2015 yz125,i race mx vets sand track,full rebuild. There should be little numbers stamped on the jets that tell you their size. red May 31, 2020 · Then you choose pilot and main jet sizes to match your needle setup and conditions. Now it runs amazing, revs out nice but it still wont idle and has a slight bog down low. I’m guessing this was why my pilot circuit seemed to make no change from 35, 37. 50p. Buy YAMAHA OEM GYTR YZ125 JETTING KIT 2023 - B4X-CARBS-KT-10 FREE Shipping on qualified orders - Partzilla. My question is when should I be swapping out my main jet. Even got the nyde needle with the richer straight portion that the 24 yz125 call for in the cold and same thing. I have noticed as the humidity has dropped the bike seems a little bit lean up top still. May 28, 2023 · Secondly, I bought this carb for my 2001 Yamaha YZ125. This particular model year YZ125 was known to be one of the best jetted in stock form bike ever. Still bogs when you try to crack the throttle open. The numbers I have are, 887 T-0 I cant seem to find one online anywhere and the OEM parts diagrams don't list it. 3. The bike came stock with a 6BGK9-75 needle with the clip in the #3 position, for 70-85 move the clip up to the #2 (from the top) position and move to the #1 (top) position for 85-100. Words matter. You can easily compare standard Keihin/Sudco (xxx) codes and late model YZ250 (N3xx) codes in graph form. fatty,shorty,vforce, 20 deg Celsius ,50m altitude and after alot of jetting changes i am 35pilot 440main ,stock needle 2nd clip from top,2 turns air screw and its so crisp,just crack the throttle and its pulling(as much as a 125 can haha) Apr 15, 2007 · The stock needle on my 2005 yz125 is a 6chy5-80, and the stock needle on the 06-07 yz125s are 6bfy42-74. YAMAHA YZ85 (02-18) $ 195. 5, 43-74 clip 3, and kept the 420 main. set the air screw at 1. I have a JD jetting kit for it with everything it should contain. With this jetting I am still just a little rich on the pilot. I ride between 5000-9000 ft elevation in Utah. If you do a search for "2005 YZ 125 jet needle" you'll most likely come up with offers of JD Jetting kits. I got the low end very clean with the stock 40 pilot at about 2 1/2 turns on the screw and the low end power is great. . Add a #40 pilot and #430 main jet and you then have stock YZ125 / YZ125X settings but instead of a specific float height, Yamaha specs an actual fuel height measurement, Jul 18, 2020 · the pilot, airscrew, needle, and main jet all control fueling at different throttle openings. If you run any after market pipe, silencer , reed block or cylinder porting – then you will need to make changes. so the 400 got it good but i got a bog still at 1/3 throttle so i raised the needle clip from slot 3 (center) to slot 2 and it helped a good bit, i think d May 4, 2018 · Here are the 38mm Mikuni TMX jetting specs: Main jet: 430 Pilot: 40 Needle: 6BFY43-3 Clip: 3rd from top Air screw: 2-1/4 turns out Notes: Yamaha includes one richer (440) and one leaner main jet Oct 19, 2022 · Hi there, I have a 2019 yz 125 and have been having problems with jetting. I am thinking the next best move is the blue needle in clip position 3. Jan 20, 2016 · Main jet: 390 Pilot Jet: 32. Bigger Engine Works Better With Bigger Pipe Jun 12, 2022 · The jd jetting kit specs in the kit with thier needle. Apr 23, 2018 · A good starting point is the 2008 stock jetting for a USA model YZ125. Multi-taper needles. You have the needle one clip leaner than stock assuming you are using the stock needle. Feb 4, 2024 · I’ve ran every needle the bike came with from top to bottom, nydf, nycf, nyef. By Deinabolic, May 23, 2009 in Yamaha 2 Stroke. I believe I'm running the red needle with the clip on the 2nd from the top, and from 0-1/2 throttle the bike falls on it's face. Mar 21, 2019 · Disassembled my 2016 YZ125 Mikuni TMX carb and found the same issue with the jet block gasket. Bottom end running is killing the bike. Here are my jetting specs in TX: Elevation 500', Temp 80-90deg Main - 330 (350 stock) Needle - 1st slot from top of needle (stock is 2nd from top) Pilot - 50 (stock is 45) 1 turn out Changes to the bike that have affected the jetting: ProCircuit Pipe & Silencer V Force 2 I have ridden the bike in 35-40 deg weather also and each jet went one richer. This made the bike much better, we noticed the main jet slightly lean on heavy loads so also went to a 165. Feb 21, 2023 · At smaller throttle opening (say 1/8-1/4 throttle), as it sits deep into the needle jet / emulsion tube, it's the needle straight diameter that meters the amount of fuel passing around it. exhaust modifications or changes in altitude. From 2011-on, the north american bikes have been equipped with the 75mm longer/quieter silencer, Jul 3, 2020 · Additionally, the 410 main jet was exchanged for a 430, while the 6BFY42-3 needle was swapped out for a 6BFY43-3 needle. For trail riding you will probably want to go to a 37. People have asked why Yamaha hasn't changed the spec to the NExx needles if they work so good, and to the effect of what you're saying - the factory has to build things to be fairly foolproof. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Recommended Posts. Rich off the pilot and lean transitioning to the needle. After getting your new needle to replace the bent one, go through the carb and ensure it’s in proper running order including float height. I am going to try the following jetting out, maybe this weekend as I have a race next weekend. The jetting in the carb is far leaner than normally specified for my bike. This issue is very well your problem. In stock. main jet, without adjusting the needle, or. Edited January 21, 2021 by mlatour Jul 29, 2018 · working on a 2004 yz125, doing the jetting and i had to drop it down from a 420 main to a 400 bike wouldn't even run under load with the 420. 5 out. I tried raising the needle clip 1 notch but had a horrible half throttle bog so I would say your jetting is about right. *Now with the Addition of our Patent Pending XCELERATOR metering rod that gives a significant boost in low RPM torque (up to 20%) and rideability over our previous metering rod. After 10 hours was going to do ring change. ), but some prefer single taper (Keihin) needles. 5. Rubber Viton tip float needle. I've currently installed #40 pilot, #170 main, Blue needle #2 position, air screw about Jul 19, 2019 · TOP TIPS FOR THE YAMAHA YZ125. changing pilot jet size. Cleaned it, carb kit, float setting, JD jetting kit, very many jet changes, needle clip positions, - each thing that I did got it a bit better. Oct 26, 2020 · changed my needle jet from an s-7 to an s-4, and the jet needle from a 43-75 to a 43-74. Dec 5, 2020 · #40 pilot jet #4 cutaway throttle slide # S-4 needle jet #43-74 jet needle, 3rd clip position #430 main jet fuel level set 10mm +/-0. Jet Needle SKU: 200-3015 $0. Based on Jetting 101, my pilot jet is the correct size (1 1/4 turns out seemed to rev the highest). Claiming that the bottom to middle transition was rich to lean. The kit comes with instructions and charts that carefully walk through the installation process and offer guidance to help get peak performance at all elevations and in all conditions. In theory with a big bore you shouldn't have to run any richer than these settings Feb 11, 2024 · A known very good baseline to start fine-tuning from are the 'stock' 2010 YZ125 settings: air screw 2 turns out #40 pilot jet #6BFY42-74 needle in the 3rd (middle) clip position #410 main jet Additional infos as there were different specs over the year for this same carb: Worn reeds will mimic rich jetting, and worn rings will mimic lean jetting. Mar 21, 2023 · Jetting – We started playing around with jetting at the track and went from a 62 pilot to a 58 pilot and re adjusted the mixture screw, we then went to a half clip leaner needle on the third clip NYCG. Deinabolic. Jet it right. Same with the slide. 75 out Main Jet 340-350 1997 6 days ago · The jet block gasket on these carburetors is bad from the factory and negatively influences jetting - don't even try to get jetting right before you've renewed this gasket. size on a mainjet without adjusting needle – main jets, pilot jet – JDJetting custom needles and clip Year ; YAMAHA : YZ125 : 2022 : Related products. (10 bucks. high rp Oct 7, 2017 · Proper jetting (and fuel level) is key for best driveability, each bike and rider is different. Back to stock. Jan 21, 2024 · In the case of the Mikuni TMX38 (as used on the 2004-2021 YZ125) neither the jet block seal nor the needle jet are shown, listed nor sold thru Yamaha but rather only available from Mikuni parts distributors and/or, aftermarket sources. Recommended Jetting: 168 main. Lean jetting is still a jetting problem. 7mm ID x 6. This version of the YZ125 is known to be lean on Jul 14, 2022 · I'd be tempted to start with the very best stock settings Yamaha ever had with the same carb on the 2006-10 YZ125 and fine-tune from there. A stiffer power-valve governor spring made the valve open at 9500 rpm instead of 9000 rpm. So it is larger than the stock carb. Jul 27, 2006 · These are the available needles from Yamaha for the 06 YZ 125: 6BFY42-74 STD . 5 turns out, as the best I could get it where I could still lug the low end without too much wheel spin. The key to this jetting spec is the Y3 needle that you can get from Pro Circuit. Depending on ambient temps/conditions, I use either a 6BFY42-74 (stock) or the optional 6BFY43-74 needle. Feb 11, 2015 · needle, and main jet coincide with each other. Pro circuit says that these are stock settings for a 2012 yz 125: 430 main 40 pilot 6BFY43-74 needle Jun 26, 2017 · The carburetor got one less bypass port and a new 6BFY42-74 needle. JD Jetting jet block gasket kit 2002-2021 Yamaha YZ 125 / o-ring repair rebuild | eBay Oct 20, 2019 · Make up a fuel level gauge if you don't have one. YAMAHA YZ125 carburetor jet kits and jets, main, pilot, slow and air jets . Dec 29, 2021 · The stock jetting we had on our USA spec bike was 75 pilot 160 main 2nd clip on stock needle NYDF While I think there is more time we will spend on the jetting - we tested from 65-75 and found that it developed a lean bog around the 68 needle unless we had the air screw at 1/2 turn from all the way in. Hope this helps!#howto #jettingspecs #yz125x Jan 20, 2021 · say my YZ125 : S-4 needle jet (2. Aug 16, 2005 · My YZ125 has a Pro-Circuit works pipe, a SA silencer, and a Vforce reed valve system. 5 Air screw (turns out): 2 Needle model/Clip position: stock/2 Altitude where you ride: 500ft Temperature winter/summer: 60-70/80-100*F Reeds: Boyesen Rad Valve Pipe/silencer: Pro Circuit Works Pipe + Stainless 304 Shorty Head mod: Stock Other mods: No-Toil air filter Type of fuel: AvGas 100LL 100% May 12, 2024 · As far as the jetting is concerned, the GYTR Y3 needle worked great with the Apex head. I bought the bike used and im assuming all the jets are stock. Yamaha has been making a YZ125 since— well, likely before you were born. Air screw @1. Main Jet 290 1984 Pilot Jet 60 Needle STOCK Clip Position 3RD Air Screw 1. Apr 19, 2016 · It had the stock needle with the clip on the second position from the top, or the middle, however you want to think about it. com My Garage . I’m running the 35 and 370 main, with the needle in the middle (position 3). For Jetting i want to have a baseline, please can anyone who has done the PWK Conversion lead me in the right direction? Abo Oct 26, 2008 · Ok, went back to stock jetting. Oct 24, 2012 · It came with the stock 460 main jet and a 20 Pilot jet. Since it ran fine in cold weather it very much sounds like a jetting issue. Engine is stock, Reeds are VForce4, Exhaust is FMF Fatty with PC Shorty muffler. I jetted it with a 50 pilot , standard needle (clip4), and a 178 main (basically stock 2005 YZ250 jetting except for the needle clip), and no power jet. Same goes for some internal fork / shock parts. Buy OEM Parts for Yamaha Motorcycle 2002 CARBURETOR Diagram Dime City Cycles is the leading destination for Yamaha YZ125 Carburetor Parts. Sep 1, 2022 · Hi there, i need some advice please! I have a 2002 YZ 125 with a PWK AS 38 short body carb. Not only will a lean air/fuel ratio cause bogging, it will also burn down your engine faster because there’s not enough fuel to “cool” the Mar 21, 2022 · Pro Circuit lists the following as stock settings for a 2000 YZ125: #35 pilot jet #53-75 needle / 3rd clip position 1. Went back to the stock needle. I replace my needle with the one from the 06-07 and have done only low end pilot circuit testing (do to the weather). Dec 11, 2023 · Suspension, jetting and gearing are important to make your YZ125 comfortable to ride in the woods and off-road, but that’s just the beginning. The special needle they mentioned is this daul tapered needle that came out a few months later. Before you start the jet testing, Install a fresh plug. Piston badly damaged due to detonation around edge. This kit includes the YZ 125 specific carburetor and a throttle cable. A change in pilot jet and clip position on the needle may also be required for optimum performance. 085mm meaning my initial thoughts were wrong as your needle circuit is actually a tiny bit richer than mine right off-idle. 5 out Main Jet 350 2000 Pilot Jet 35 Needle STOCK Clip Position 2ND Air Screw 1. James Dean purpose-built this jetting kit for riders looking to improve running performance and throttle response throughout the RPM range. Y3 needle in the 2nd clip position Jun 12, 2022 · The stock jetting we had on our USA spec bike was 75 pilot 160 main 2nd clip on stock needle NYDF While I think there is more time we will spend on the jetting - we tested from 65-75 and found that it developed a lean bog around the 68 needle unless we had the air screw at 1/2 turn from all the way in. The same goes for reeds that don't seal properly, and a silencer that needs re-packing. I tried messing with the idle screw. This is why larget jets are used in cold weather situations as the chart shows. (hot humid summer / cold winter) Jun 19, 2023 · "Jet Needle" , not needle jet. 5 turns out. ) APEX head with SX dome. So, now you're holding the spring up with the pliers and you've got a hold on the throttle cable at the same time. I tried adjusting all of it and always came back to stock. Sep 21, 2023 · The YZ125 uses a #7 slide, while 125x uses a 6. Motor nearly wreaked as caught JIT. We took it trail riding and he fouled 6 plugs. 820mm) minus a 43-74 needle (2. it's sizing must no doubt be matched with the correct needle as well. YAMAHA YZ125 JETTING With 14 years to iron out the bugs, Yamaha has the Apr 18, 2021 · Then take a flat screw driver and pull your pilot out. 7. So like suggested change your pilot and main to the yz250 settings. Main jet #162 Pilot jet #72 Power jet #35 Dec 22, 2023 · I suggest you get the GYTR jet kit with the Y3 or Y4 needle and go from there. 62 Pilot . You will have to go down on the main jet at the minimum. May 24, 2013 · Thanks, that helps. Mar 9, 2022 · (2) Performance. I brought my 2016 YZ125, fitted with a Keihin PWK38 from a late model YZ250 . If you change the needle position much or change to a different needle then you may also have to change the main jet because about 20% of the WOT fuel flow is due to the needle diameter at its jet. Back to stock for me! Feb 26, 2008 · Here are the stock YZ125 jetting specs: Main Jet: 410 Pilot Jet: 40 Needle: 6BFY42-74 Clip: Third from top Air screw: 2-1/4 turns out Note: Yamaha delivers every YZ125 with an optional 6BFY43-79 Mar 20, 2002 · My brother-in-law has a 2001 yz 125 and his jetting is 25 pilot,460 main. The needle jet is part of assembly #11 in the picture above. The 2002 was the first year of the triple tapered needle. I am pretty new to jetting by feel, so please forgive my noobie questions. I my stash of jets for my YZ125 I have aftermarket #450 main jet than flow more / runs richer than a genuine Mikuni #470, really misleading when you are trying to fine tune. Expert tuning setup without being an expert. These are more highly developed and fine-tuned than stock jetting parts. Pro Circuit’s 2022 Yamaha YZ125 exhaust doesn’t change the way the YZ125 runs down low, but from 9500 rpm all the way to peak, the Pro Circuit pipe and 304 silencer build Jul 18, 2008 · I used stock jetting of 410 main, 4th clip position from the top and a 40 pilot jet with the 6CHY5-80 needle for 70 degrees and 0’ elevation. That's exactly what the regular YZ125 comes jetted with for all-out motocross track racing so without a doubt too rich for recreational trail riding. He has a rad valveand stock pipe. You need to learn how to ride properly. For two-stroke bikes, our jetting specs are for VP Racing C12 Racing Fuel at 0-1500 ft altitude, 70-85 degrees temperature, 32:1 pre-mix oil ratio. 5mm to 10. Also, it was very sputtery in the middle of the power band particularly in Apr 16, 2024 · 2-Stroke Yamaha 1986 YZ125 Carburetor Upgrade Ready to use complete 2-stroke dirt bike carb upgrade for all models in fitment. What I don't understand, is why the standard jetting for Europe is so much richer overall than USA. Vs the Yam needles, I found the JD needles prefer a much smaller pilot and slightly larger main jet. Pilot sizes from 50-75, mains I’ve only been up to 165. Share More sharing options Followers 0. Nov 22, 2021 · 2022 YZ 125 Introduction. Or is it the jetting thats causing the bog when i quicjly open the throttle and when im reving high? If so what jetting do you guys recommend for my 2007 yz125. Jan 7, 2019 · It mentions this special needle that they used to clean up the jetting. So my 35 pilot cannot be compared to the pilot size when using the Yam needles. Oct 14, 2022 · The procedure to adjust the fuel mixture by changing the clip position of the jet needle. Clean the pilot jet and tighten the pilot jet to the specified torque if it is loose. This would be for warmer weather +60f, and sea level to 2500'. Apr 17, 2023 · There's always mention of pilot jet, needle/clip and main jet experimentation but I don't think anyone has yet mentioned trying a leaner power jet. The service manual gives basics settings to get you in the ballpark but you have to fine tune for best results. S&S have extra jet kits available which are designed to cover most jetting James Dean purpose-built this jetting kit for riders looking to improve running performance and throttle response throughout the RPM range. I settled on 62P, 162M, NYCF-2 air screw 1. NEEDLE-JET,6CHJ11-84 1 (OPTION) KX125 slides are: May 10, 2021 · (High RPM) Air screw tunes the pilot jet. 25 out Main Jet 350 1999 Pilot Jet 50 Needle STOCK Clip Position 3RD Air Screw 1. How should we jet this bike? Jun 5, 2013 · If your engine has a worn top-end, fix it first. had it good for summer (35 pilot, 44-74 needle on clip 2, and 420 main) but now it is fall and about 45f degrees and i swapped to a 37. 00 inc GST. 6BFY42-75 . All jet testing must be done with the engine at full operating temperature. Air screw should be about 1. Replace the needle valve seat if it is damaged or worn. Feb 5, 2016 · Yes, read the jetting recommendations in the YZ manual and they recommend stock jetting for a huge range of temps. Apr 17, 2021 · I have a 1996 Yamaha yz125 that I recently bought and I bought a jd jetting kit for it and according to the paper that came with it, it said to put a 380 main and a 40 pilot in which I did, I also installed a new needle provided in the kit(red) at the 4th clip position, the bike runs strong but h Feb 18, 2021 · Here are our 38mm Mikuni TMX jetting specs: Main jet: 430 Pilot: 40 Needle: 6BFY43-3 Clip: 3rd from top Air screw: 2-1/4 turns out Notes: On our full-race Pro Circuit-built Ryan Villopoto replica Jun 4, 2020 · Pretty sure the one in my 2010 YZ125 is an S4, . The more the slide/needle are then lifted (1/4-1/2 throttle) the clip's position changes the progression rate at which the needle's tapered section is 38mm H-Series Carburetors for the YZ 125. This needle is a must have for these bikes. The Yamaha jetting sheet says to run the 35 pilot and 350 main. I made this video to help people that need quick reference as to float level on the newer YZ 125‘s that require the float le Feb 14, 2019 · if before 1/4 throttle it feels like it could withstand to be a little richer then raise the needle by lowering the clip. 46 Add To Cart E-Clip - Plunger - Mikuni SKU: SU002-673 (# 40 pilot jet, 42-74 needle, #410 main jet). May 5, 2007 · - #40 pilot jet - # 42-74 needle, 3rd clip position - #410 main jet - 32:1 premix ratio If you trail ride rather than motocross, you could benefit from leaner pilot and needle settings. has a fresh top end and has had this issue before it was replaced. Quantity: 4 Pieces. Apr 28, 2017 · The float adjustment in late model ('05-'17) YZ125 using the Mikuni TMX38 carburetor is actually set by measuring the FUEL level, specs are 9. 2. We're still fine tuning this new carb on the 2023 YZ125X (2022/2023 YZ125). Check out the options and upgrades above to further enhance the performance and feel of your motorcycle. Mar 11, 2024 · We tested with pump gas and it was a little rich so going to a 165 main with pump gas helps. Apr 22, 2022 · Main jet: 162 (160) Pilot jet: 72 (75) Needle: NYDF Clip: 1st line from top (2nd line from top) Air screw: 3-1/2 turns out Notes: After trying the leaner NYEF needle, we went to the stock needle Dec 13, 2017 · I bought a 2002 YZ 250 and I wanted to move everything back to stock so I could jet it to my area, the PO moved the needle(N3EJ) clip up to the top position (leanest), so I lowered it to position 2 and the bike would bog between 1/4 and 1/2 open throttle, clip position 3 was even worse. Jan 12, 2018 · Buy JD Jetting Jet Kit (No CA) for Yamaha YZ125 2001-2018: Improves throttle response with multi-taper needles. 74mm) = 0. Personally, I prefer triple-taper needles (JD red/blue, Honda A7x5/2xxR, etc. 7 JRU-8027A 10 pieces Apr 18, 2017 · “Pro Circuit’s R&D technician, Mike “Schnikey” Tomlin, spent hours dialing in the jetting and came up with Pro Circuit’s new OEM-spec YZ125 jet kit. As you probably know, cold air is denser and requires more fuel. Detailed instructions. With VP T2 or C12 this jetting below was the best. With the new pipe and reeds, I tried the next leaner needle. May 23, 2009 · Mikuni jet needle removal on 03 YZ125. Float height off and /or float needle valve not sealing. Edited February 12, 2023 by mlatour Mar 5, 2024 · I have a 2000 yz125. qxd (Page 1) Created Date: 3/27/2003 11:57:09 PM May 17, 2019 · The puking of fuel is a key detail you need to mention. Premix: 32:1 with Klotz R50. Pilot is for lower rpm range operation, needle for mid, and main jet for about. JDY021 - Yamaha YZ125X (23-24) quantity James Dean purpose-built this jetting kit for riders looking to Jul 21, 2022 · Jetting that is too rich will hesitate and stumble when under load. Feb 11, 2023 · The stock / factory service manual jetting chart settings are usually a good starting point (70°F) but most will find the pilot jet circuit is a tad too rich and tends to load up and, also benefit from running the float 1-2mm lower when slower paced trail/off-road riding. Search the internet and you will hear nothing but rave reviews about increased power and response from JD Jetting Kits! The James Dean custom jetting kit is designed to improve throttle response throughout the range by using specially made multi-taper needles. Feb 4, 2020 · Pilot jet: 35 Needle position: 3rd (middle) Is it the powervalve causing the bad top end power. While it probably helps to avoid fouling, you are sacrificing a lot of 'roll-on torque*' by running such a small #35 pilot jet. May 22, 2019 · Additionally, the 410 main jet was exchanged for a 430, while the 6BFY42-3 needle was swapped out for a 6BFY43-3 needle. Universal Float Needle Kit by K&L Supply®. Also, I know it's a rich condition (checked plug and bogs in first gear). I run the bike in various temperatures throughout the summer months (1500' elev. 5 out Main Jet 160 1996 Pilot Jet 42 Needle STOCK Clip Position 2ND Air Screw 1. so I did a little jetting and I have a 420 main and 37. Oct 12, 2017 · Agree - I spent (gained experience lol) for a few months on my project bike with the carb that came with it (38 mm Milkuni on an 01 YZ125). 5 out Main Jet 160 1998 Pilot Dec 28, 2011 · Buy YZ125 YZ 125cc 125 cc Custom Jetting Carburetor Carb Stage 1-2-3-7 Jet Kit fits Yamaha: Pilot Jet, Needle Adjusters, Nylon Spacers, Drill Bits, Slide Hole mod May 14, 2023 · I have a JD jet kit and went with JD's recommendations for 3000+ft at a 50 pilot, 180 main, and the red (hot) needle. 🤗 Welcome to Vegas RoManiac Channel 🤔 U Ever wondered what I use when I ride or fix my bike !? 🤨😍 I ride on this Knobby REAR TIRE - https://amzn. Check Order Status Jun 11, 2020 · Stock jetting for a north american market YZ125X is a #40 pilot jet, a 43-74 needle likely in the middle (3rd) position and, a #430 main jet. Aug 9, 2023 · On our built-out YZ125 race bike, Schnikey used a 62 pilot, 165 main jet and a Yamaha Y3 needle, which can be bought through Pro Circuit, in the third clip position. Aug 12, 2023 · A bigger engine is going to suck in more air/gas, thus requiring leaner jetting to make it burn properly. Start with the airscrew at 2 turns out and you will be within ¼ turn + or – from the optimum setting. The motor is very sensitive to change and can slip to the lean side easily with any change. Bike only spooged a little, which is a great improvement. Sep 30, 2023 · As far as jetting, I have a '23 and am riding around sea-level and up to your elevation. ) or dual taper needles (Nxxx, Honda R13xxxKA, etc. Feb 26, 2009 · Here are the stock YZ125 jetting specs: Main Jet: 410 Pilot Jet: 40 Needle: 6BFY42-74 Clip: Third from top Air screw: 2-1/4 turns out Note: Yamaha delivers every YZ125 with an optional 6BFY43-79 Mar 21, 2012 · Here are the 38mm Mikuni TMX jetting specs: Mainjet: 430 Pilot jet: 40 Needle: 6BFY43-3 Clip: 3rd from top Air screw: 2-1/4 turns out Notes: Yamaha includes one richer (440) and one leaner mainjet Feb 22, 2022 · I have 15 hours on the bike and 5 or so with the current jetting. 75 turns out on the air screw 6. Stock motor and pipe. Dbkidcraig, This is very close to where you are going to wind up with the Mikuni in your 02'. YAMAHA YZ125 JETTING With 13 years to iron out the bugs, Yamaha has the Jun 4, 2022 · Hello all. 5 turns out to start out. Apr 22, 2020 · over the previous model years, the stock jetting specs have slightly enriched with was used to be called the '1/2 clip richer' needle and, a #430 main jet. Trying to jet a worn out engine is a waste of time. Dec 19, 2004 · I'm not sure that sudco retail, If the carb measures 34 in the bore thats what it will be, the needle is a strange number, 6DH3 or 4 is more std, 159 p4 is also a bit large but it may be right with that needle, 159p0 -p2 seems more common, main jet about right, 240 in mine, although one man on the forum uses a 300 in a 36mm carb, I tried a 260 and the engine went flat. 30mm OD 0125A2M2. Set the float level to the proper specs, an incorrect float height will affect yourjetting all across the throttle range. 5mm above the bowl mating surface (using the clear tube method) The engine is unchanged since 2006 but since 2011 the jetting is actually a tad richer Jul 6, 2015 · the stock settings for the 2006-10 (*North American models) are: #40 pilot jet, 6BFY42-74 needle, #410 main jet. Stock jetting in right now: 350:main 45:pilot 6BEF16-69:needle 4th:clip from bottom 2:air screw turns. By Matt Mattoon and Jimmy Lewis. Sep 29, 2022 · Hello, I have 2005 yz125 and bought Keihin PWK 38 carb with JD jet kit. 25 out on airscrew Yamaha YZ125 Carburetor Jets & Needles. This is what we found out so far. I'm pretty sure they changed the needle number in 2011 and later models and I preferred the '08 needle out here on the west coast. 2008 Jetting (USA model) Air Screw: 2-1/4 Turns (out from closed position) Slow Jet: #40 Needle: 6BFY42-74 (3rd clip position, from top) 2007 YZ 125 float level setting. Will end up closer to what the yz250 comes spec'd with for it. I got the jetting sorted first and then I installed the Apex head. Tighten the needle valve seat to the specified torque if it is loose. Then pull the needle out the top of the carb and count how many groves down the clip is. Mar 12, 2009 · I got a 98' YZ 125 all stock motor. i started it up and it wouldn't idle and it ran like crap. Keep in mind all settings will require adjustments for each 10°F rise or fall in ambiant temps. Add To Cart Main Jet 160 2000 Pilot Jet 45 Needle STOCK Clip Position 3RD Air Screw 1. Oct 11, 2009 · Greetings, I'm new to motorcycle maintenance and recently bought a used YZ125. Pilot jet and needle are best tuned by 'feel', the main jet by plug coloration. What do you recommend for this carb jetting for a 2001 YZ 125 Yamaha? Mar 24, 2009 · For 70-85 degree temps use a 410. Lean Jetting. On a 125 the main jet is what people mostly change because 125's are mostly riddin on the pipe. Universal HJ™ Hex Main Jets by EBC Brakes®. Need your help, can't figure this shit out! Listen to videos below of bike bogging, hesitating, and sometimes wanting to cut out at anything over 1/3 throttle. It runs pretty well with a new spark plug, but is constantly fouling the plugs and it doesn't like to idle for very long without stalling. VForce 4 reeds will NOT fit with the Lectron carburetor. Order Help. Just replaced top end, new piston and rings, new cylinder (all OEM). It only improved an already great running engine. Based on the way he will be riding (slow tight woods then WOT combos), I'm sure I'll be jetting it, since the first go around last weekend he fouled the plug twice (replaced with new plug Jul 11, 2012 · A little while back i started a thread looking to make my 125 a bit more trail friendly /topic/967798-2004-yz-125-trailenduro-mods/ So i decided to start playing with my jetting. 5mm throttle slide cutaway #350 main jet In general, a big bore will require leaner settings than a stock 125 due to it's increased vacuum signal, more easily pulling fuel up the jets. On our built-out YZ125 race bike, Schnikey used a 62 pilot, 165 main jet and a Yamaha Y3 needle, which can be bought through Pro Circuit, in the third clip position. 3/4 to wide open throttle. Nov 9, 2015 · The stock settings for a 2006-2011 YZ125 should be : air screw 2-1/4 turns out #40 pilot jet, #42-74 needle, 3rd clip position #410 main jet Most stock bore 125's respond well to having the pilot jet and needle clip position leaned out 1 step. YAMAHA YZ125 JETTING Yamaha has Apr 22, 2023 · I'll also buy the JD Jetting jet block repair kit. jetting was intentionally changed drastically on both ends mains pilots even needles to spot a difference but the bike doesn't react differently to the change. 835mm) minus a 43-75 needle (2. So I just wanted to know about how many jets leaner i neeed to go on the pilot, the main, and needle clip. We take a deep dive into the brand new GY Jan 30, 2002 · So the 79 is leaner than the 77 needle and by installing the 6BHY24-77 needle your richening up the overall jetting specs to cure a slightly to lean condition it causes. This is the biggest revision the YZ125 has seen since 2005 and the introduction of the aluminum frame. Most sources for my YZ125 state to use a #30 pilot jet, and a #440 to #460 main jet. 5 pilot, needle second clip. Main jet #160 Pilot jet #75 Power jet #35 Needle NYDF Needle position #2 Pilot air screw 2-5/8 stock and 3 factory turns out Motorcross Action - they said the NYEF was the stock needle in their video, don't know if that was a typo. Title: YZ250 jetting (000346). 5, or 40 pilot jet. something like 6C-H8-22-79 something like very close to that I don't have the manual on me right now. Universal Mikuni Needle Valve and Seat by WSM®. Then, grab the throttle cable with needle nose pliers directly below the compressed spring. These steps should help you troubleshoot engine performance issues with your Yamaha YZ125 (2023) motorcycle. It's that barrel looking piece with the oring, above the needle valve. 5 out Main Jet 152 1999 Pilot Jet 45 Needle STOCK Clip Position 3RD Air Screw 2. Try using a 30 pilot jet for 70-85 degrees and use the stock 25 pilot for 85-100 degrees. 6BFY42-72 . For 85-100 you will have to go leaner. 6BFY42-73 . ) Now, this one I'm looking at (from "Niche Cycle"), as well as others I've found, come with 250cc baseline jetting. 0 out Main Jet 160 1997 Pilot Jet 40 Needle STOCK Clip Position 3RD Air Screw 1. In your history, 2005 was the last major revision with an aluminum frame. It has a #20 pilot and #370 main jet. Needle jet tube is the brass section the needle slides in and out of and the main jet is screwed in to the bottom of. I would bet money that Diggers jetting spec will work just as good or better than the GYTR jet kit. bwfc kdsy rzhvuv pok mlxdlqf dgwchk kbnwpbx xwbys xqo uwranho