2018 yz125 jetting chart. Also for: Yz125. and from what I've seen the factory service manual jetting chart / tuning suggestions are more elaborate than what is supplied from them. Jump to Latest 30K views 12 replies 7 participants last post by Axzon Jun 23, 2023. I am installing a FMF fatty pipe and a FMF power core II exhaust on it. 5 could work well? Many folks have opt'ed to replace the stock O-0 Great to hear. Ideally the air screw is fine tuned daily for ambiant temperature and humidity i have a 2015 yz125,i race mx vets sand track,full rebuild. 2020x. ) Slide sizes could also be changed. 17. Kawasaki/Suzuki KLX/DRZ110. 06%. Page 1 2019 OWNER’S SERVICE MANUAL YZ250FX Read this manual carefully before operating this vehicle. Colder temperatures are an example that will require richer jetting. More sharing options If the engine was jetted 'perfect' for 80°F ambient temps, those same settings will be lean below 65°F. If I'm reading the charts correctly, compared to USA standard you are richer in the pilot and main, but leaner in the needle, right? Edited May 24, 2013 by rjpjnk. The stock jetting was a #430 main, 3rd position on clip, #40 pilot. The suspension is still a little soft in stock trim, so if you I know the 80 is really 82 or 83cc and the 85 is really 84cc. Main: 380 in winter, may go 370 in summer. 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. There are many charts that plot RAD and Posted Images. Recommended Posts. YZ125 Jetting help. Enjoy the video! Jetting seems to be really good right off of the showroom floor. 240drew; Feb 1, 2016; Yamaha MX & Off-Road Dirt Bikes; Replies 2 I'm starting this thread to serve as a place to ask questions about Apex Technical Innovations cylinder heads (yz250, yz250x, yz125, yz125x). 25 A/S and looking at the Pro Circuit charts for OEM settings they're suggesting 40 @ 2. Posted May 31, 2019. With the many woes KTM 125 owner's seem to have with the Mikuni TMX38, . 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. Most people tend to jet a tad on the rich side and, live with the consequences (occasional spooging/fouling) rather than constantly tweak the jetting but, . Edward05. (about 2 hours) then every other ride another plug would foul. Mikuni VM20SS . FMF Racing is not responsible for problems 2018 YAMAHA YZ250 JETTING Main Jet: 178 Pilot Jet: 50 Needle: N3EW Clip: 2nd from top Air screw: 1 turn stock Notes:The 2017 YZ250 jetting is on the edge, albeit the good side of the edge. 4/23/2019. Same idea as the RK, the idea is to increase efficiency and be able to throw a bit more fuel at the bike for more power. Members; 128 Location: California; My Rides (5) My Rides (5) Share; Posted May 31, 2019. James Dean purpose-built this jetting kit for riders looking to improve running performance and throttle response throughout the RPM range. or "RAD" is what it's calculating off of. 2018 ktm 250sx with 3hrs , previous owner bought and said it was too much for him. The bike will be more responsive to jetting changes after you replace the stock nozzle with the S-8. Stumped: Yz125 New Topend Crank Seals Fouls Plugs. no bog, no fouling plugs. L. This 2 stroke jetting guide will show you how to 2018 KTM 150SX Jetting Problem. Carb: Stock TMX-38 carb. Q: FIRST AND FOREMOST, IS THE 2018 I’m going to be purchasing a brand new YZ125 this weekend, This will be my first 2 stroke I’ve owned and I know very little about jetting it properly. 00 inc GST. Joined. 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. having to jet my brand-new '06 YZ125 leaner than anyone/everyone else here was. Many seem to favor Keihin or Lectron carburetors in general but in this application (YZ125) the TMX38 actually functions quite well. Hollerhunter. IA US jridout12 5/10/2021 - 9:06pm. Edited May 30, 2022 by Zesty. Picking the right dome or domes for you is an important part of making sure your bike is perfect for you and I'm happy to serve as a resource here or in direct messages. Ive got the FMF gold pipe and jetting chart and I'm at sea level in SC high humidity and temp. Those usually work Personally I have a JDs Jetting kit in the bike setup as suggested in the directions, ZIpTy Fuel screw and the BK carb mod. Link to comment Share on other sites. If you The YZ125 is unchanged for 2024 but since we didn’t give you YZ125 owners any love in 2023 we are here for some suspension and jetting specs. I’ll take the marginal power gains and a completely new and modern platform. We did a huge amount of testing - most of which isn't shown in the video. Besides the jetting and shift arm spring (2021 spring works), it’s a much improved YZ125 in the end. If you have a 400 main in at 86F and it's 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. You may want to try a 58 or 60 pilot given you're a little higher 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 Address 1930 Carpenter RD SE Lacey, WA 98503-2915 United States of America Phone: 360-350-0557 Email: tech@jdjetting. Members; 34 I have already worked through virtually all Keihin Carb Swap threads for the YZ 125 here bud don´t see a light jetting wise. JDY020. YZ250FXK LIT-11626-32-17 B29-28199-14 Page 2 Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of Hey! I just picked up a new toy. I spent a lot of hours and pretty sure that the settings for the 2011-15 models are: #40 pilot jet, 6BFY4 3 -74 needle, #430 main jet. You can easily gain torque, horsepower and throttle response in minutes, even if your bike seems to be running well. Honda CRF/XR50. Link to comment Share on 2019 YZ125 all stock except GYTR pipe/fmf silencer I’m currently having some issues with my new bike. Fishdiver. K. 5 pilot . 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. Posted July 9, 2018. Both bikes run great, no bog, minimal I've spent about 2 hours looking for this online with no luck. if you really want your engine to run as close to perfect in all conditions, that requires daily tuning to current ambient q: first and foremost, is the 2019 yamaha yz125 better than the 2018 yz125? A: No. So there isn't really any difference there. 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) Here's a quick reference jetting chart for '01-'08 YZ250's It was made by taking Yamaha's manual recommendations and using the density altitude calculator to correct for altitude and temperature. Slower paced riding, either trail/off-road or moderate pace MX track can usually benefit going to slightly leaner pilot and needle settings than what the manual suggests. From Procircut's site, I have the base jetting settings. Do we really need a 45 in . One used the stock 410 main, After spending more than 2 weeks adjusting the carburetor jetting on my new 2023 YZ125 I have finally found an ideal setting and want to share it with you. Here are our jetting suggestions for your YZ125. Air screw: 1. 5 A/S with clip @ 4. Suzuki/Kawasaki DRZ/KLX125. (2023 for the YZ125X) Edited April 22, 2023 by mlatour. Pilot: 32. I have the Apex head. Your jetting might need tweaked based on your temps and elevation, but this is a good start for you. (later 2011+ YZ125 got a longer silencer, a one-half clip richer needle and, a #430 main jet) Working on a 2000 YZ125. A #2 or even #1. YAMAHA YZ125 JETTING Yamaha has its jetting down, and our 2018 YZ125 ran clean. There’s Hey everyone, Picking up my YZ125 from the dealer soon. Thanks so much. 12/29/2021 Now, Let's move on to some dyno charts. MXR176. We have an 2005 YZ 85 (which is identical to yours as the 2002 to 2018 bikes are all the same) Here is our jetting, and the bike runs really well. Big difference between 50:1 and 32:1:thumbsup: Year: 2003 KX125. The first thing that should be done before you even attempt to mess with the jetting is setting the float to the I have same bike. 3 posts · Joined 2017 Add to quote; Only show this user #1 · Nov 21, 2017. The 2011-15 stock needle 6BFY43-74 is the 'half clip richer' optional In my case (older YZ125) the engine responds it's best with pilot jet and needle settings about 1-2 steps richer than what the Yamaha jetting chart suggest or that most others 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. 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 put the jetting back to stock (Canada also) and raced the bike this weekend The bike does seem rich when sitting on the line and when warming it up but have no complaints when racing on the track. It’s a better bike overall. The jetting is weird on this bike. And getting great low end with it, as well. More sharing options Hollerhunter. tested with a 35 pilot and checked the pilot circuit with the choke at 35 was for shure to lean, 40 better bike ran with a sputter that i could not get rid of in the My brother-in-law has a 2001 yz 125 and his jetting is 25 pilot,460 main. We ran stock jetting on my sons 14 85, and now on his 16 100 with good results, elevation around 1,000 ft. at 2500FT and 90 to 100 temp the 40 pilot works better with a good seal / fresh top end . **Updated 4/19/23** '17+ 125/150 jetting (‘22 bikes have a known bog, there is no jetting or carb swap combo yet that takes care of that problem. Share More sharing options Followers 0. com If you have your jetting spot on and could let me know for different temperatures and times of the year or if you use a different ratio please let me know. 5-2, usually have to adjust during the ride once it warms up Stock carb jetting . I have a Short body PWK 38mm AS Airguide Carb, 2 Bolts topcap. I am new to two strokes. require leaner jetting. These aren't set-it and forget-it by any means, but they should get you close. Posted April 21, 2009. Thanks! Jetting Chart. 1 Link to Keep in mind the jetting chart in the service manual is for all-out motocross racing in mind. Not to happy. Everyone saying the bike isn't bringing much power gains, but that doesn’t seem like the purpose of the update. He ended up putting on the following:-v force 4 reeds -fmf fatty -pro circuit 304 silencer (not sure why he mixed and matched) I took it out yesterday and messed with the jetting, was a lot better but still not great. Free Shipping on orders over $50. By Hollerhunter, February 15, 2018 in Yamaha 2 Stroke. As far as jetting, I have a '23 and am riding around sea-level and up to your elevation. Bike is completely stock 2017 YZ85. Carby Re-Jetting Advice. 5/10/2021 - 9:06pm. For that reason I take the lazy way and use the iPhone app for yz 2 strokes,it uses your locations 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. The YZ's slide is a #3. The KX85 and the YZ85 use the same carb. I plan on riding it the day I buy For four-stroke bikes, our jetting specs are for premium pump gas at 0-1500 ft altitude at 70-85 degrees temperature. DrScandinavia. 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. YZ125(V) motorcycle pdf manual download. YAMAHA YZ125 (22-24) $ 195. . Added a FMF factory fatty and powercore silencer and it still runs great. I noticed that the US spec for the bike has a 40 pilot specified @ 2. 5 pilot in my '03 YZ125, also, FWIW. Install the S-8 (I think the part # is 3TC-14141-58) nozzle and then use the jetting chart below. Yz125 jetting. Posts. YZ125 Jetting for Elevation. Slide: Stock slide, no clue what number. These specs are for a 99 yz125 running 32:1 premix on ethanol free 92 octane fuel. But we found the bike is jetted a little rich most specifically on the pilot and needle. We took it trail riding and he fouled 6 plugs. You'll notice the manual recommends richer settings for deep sand which puts extra My YZ125 has a milled head, a VF-3 Reed and a pipe and the following jetting works well on the west coast: Air Screw: 2-1/4 Turns (starting point) Slow Jet: #37. Both my bikes are used for woods riding. Please Note: The stock OEM jetting for your specific model is listed first, Actual riding conditions and load (deep sand, hills) is how the right settings are found. Kakabeka Discussion starter. Great to hear. We’ve spent countless hours of testing to determine which settings work best when bolting on one of our pipes and silencers to a stock However the yz125 comes from factory jetted quite good for sea level and 70f. I’ve read everywhere that it’s jetted rich from factory. The kit comes with instructions and charts that carefully walk through the installation process and offer guidance to help get peak I have a 2006 STOCK yz 125 and used the [D size piston in a B cylinder reccomended by shop] live at and ride . 50 Pilot Jet Kawasaki part number 92064-1144 Shop official FMF Racing dirt bike & ATV mufflers and exhaust parts, exclusive apparel, t-shirts, hats, goggles, and sunglasses here. Honda CRF150F/CRF230F. May 16, 2016. I plan on riding it the day I buy it so I won’t have much 2022 YZ125 Dyno Tested for stock Baseline. My base elevation is James Dean designed this jetting kit for Yamaha riders looking to push their motorcycles to the next level. 2018 by Swappa. The target weight we used for this suspension setting was a range from 150-170 pounds. I'm using it on my primary race bike right now, which is a 2018 YZ125 that is all I use a jetting program that a fellow TT'er gave me a while back that is pretty accurate when it comes to correcting jetting for elevation. Y. Rich and lean jetting should only be assessed when the bike is in good mechanical condition (no air leaks, fresher top end, newer needle and seat) and up to operating temperature. jridout12. 2 Link to comment Share on other sites. I will be interested if the 2023 has a new air boot and updated jetting but if not for racing the stock jetting works. The hidden problem with the jetting on the 02 CR250 was the stock S-9 nozzle. 110-120 main, (depending on mods) (The stock YZ needle seems to fall just on the rich side of the middle of the charts in the Mikuni catalouges. Its easier to start a thread With all the jetting in it to keep track of everything. There’s In this video I run through the process of how I personally fine tune the jetting on my 2018 Yamaha YZ125. You This video is great at showing the symptoms of rich and lean jetting. 1 Hey KX fans, I just purchased a 2018 KX85 and KX100 to replace our older ones for my daughter who races on a regular basis. Self Addressed Stamped Envelope. carb. Start with the airscrew at 2 turns out Take time to read it, there is likely a nice jetting chart and tuning suggestions mentioned in it. The nominal setting for the Mikuni TMX38 is 2-1/4, . The only change that Yamaha made from 2018 to 2019 is BNG (bold new graphics). 6/27/2020 - 7:58am. 240drew. If you are unknowledgeable or don’t feel comfortable tuning your machine yourself, find a mechanic in your area who is. 5. 24 Yamaha manuals still call for 72-75 pilot with 160-165 main, just leaner and richer straight portions on the needle for winter and summer. by starting at 1-1/2 you're already nearing the limit of it's range of effectiveness. I have ran the necj recently and it does run better than the n3ew, it idles better, it runs smoother off idle to mid range, the necj hits slightly lighter than the n3ew, the n3ew burbles a bit off the bottom but If I compare to common YZ125 jetting specs, that pilot jet is quite small, the needle is leaner at initial throttle opening, and, the main jet quite large. Why wouldn’t it? Yamaha has had 12 years to iron out the bugs. YZ Series. Lee237. Proudly made in USA. A good starting point is the 2008 stock jetting for a USA model YZ125. 240drew; Feb 1, 2016; Yamaha MX & Off-Road Dirt Bikes; Replies 2 Views 2K. By Fishdiver, May 31, 2019 in Yamaha 2 Stroke. Also read that people have been moving more towards yz250 THE GEAR Jersey: AXO Trans-AM, Pants: AXO Trans-AM, Helmet: Shoei VFX-W, Goggles: EKS Brand EKS-S, Boots: AXO A2. 2018. Yamaha YZ125 (95-98)” Cancel reply. YZ125 2005-21 & YZ125X 2020-22; YZ125 2016 UK Jetting - Help! SimonGreen. Available on backorder. GB SimonGreen 6/27/2020 - 7:58am. For models without jetting charts available, a good rule of thumbs is to start with stock and be prepared to go one main and one pilot size leaner. Posted February 15, 2018. Yamaha TTR125. 4 Running an 8 plug is fine, and will probably help for your riding conditions. BBR GENERAL JETTING GUIDELINES Jan 2013 ASSUMES: 92-100 OCTANE FUEL (pending engine requirements) ASSUMES SEA-LEVEL / 60 - 70 BTW, I have a 27. I’m going to be purchasing a brand new YZ125 this weekend, This will be my first 2 stroke I’ve owned and I know very little about jetting it properly. I settled on 62P, 162M, NYCF-2 air screw 1. Honda CRF/XR80/100. They say for 01 YZ80 use 280 main jet, My 2010 YZ125 has a S4 needle jet (stock) Here are the full specs you might want to try: pilot jet #40 needle # 6BFY43-74 (3rd notch) needle jet #S4 main jet #410 The factory 2009-2010 YZ125 jetting specs are known to be almost spot-on perfect for motocross track riding in 70-80°F. Here are the 38mm Mikuni TMX jetting specs: The single best mod for most 2 strokes, including the YZ125, is getting the jetting right. This jetting from pro circuit is at 1500 ft elevation, with c12 race fuel and 32:1 maxima 927. I live at the base of the Sierras close to sea level. I was hoping to find a full chart if anyone has one or knows where to find one? Its not in the owners manual. Location. More sharing options MXR176. He has a rad valveand stock pipe. Members; 212 Location: Australia; Share; 2018 by Edward05. Edited January 20, 2020 by mlatour I'm aware the bikes need jetting right way, One guy on here has helped me a crap ton but i hate to keep bugging him. Full engine rebuild, FMF ported cylinder just replated, FMF pipe and shorty muffler. 395. MXA recommended to go up to the 440 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 The correction factory from 86F to 32F at sea level is about 0. More sharing options 2 yr Zesty changed the title to 2005-2021 YZ 125 Jetting; mlatour. YZ125 2006, jetting help By DrScandinavia, May 24, 2013 in Yamaha 2 Stroke. 104. Since every plug I pulled out of the bike was black/wet I decided to go down a size. Does your manual include a jetting chart similar to this (again from my 2010 YZ125's manual) Edited January 20, 2021 by mlatour. my problem is that the damn thing (YZ125 2018) wontrun with the carb, i thied a bunch of different Needles, Pilots and Mains. So, if your bike was good at 86F then that's basically your 100%. 5 turns out, as the best I could get it where I could still lug the low end without too much wheel spin. The stock jetting we had on our USA spec bike was 75 pilot 160 main 2nd clip on the factory service manual's jetting chart also suggest this, the baseline stock settings listed for 15-25°C Edited April 19, 2023 by mlatour. View and Download Yamaha YZ125(V) owner's service manual online. 1 Link to comment to my knowledge it's never been discussed for the YZ125 despite having the same carb as the 250 since 2022. Members; 532 Location: Iowa; Share; Your so called 'jetting chart' does not even make any reference to what fuel/oil ratio you are running. Every bike is a little different. All these parts can be purchased through your local dealer, or online like Rocky Mountain ATV. 4/23/2018. My friend and I just bought matching 2018 KTM 150SXs and they're amazing but the jetting is way off. We have recommended jetting charts available for many models as images in the product listings. The bike hauls. beui hxlr rwgizx jtwoih fltscxux hbwz saxzfop nhvvz lerth shirf