Fmf jetting chart yz125

bike runs great no bogs at all with stock pipe and shorty, Im about to put on a FMF fatty and I bought a JD Jetting kit cause I have been reading on the forums a Mar 24, 2015 · OK Lets start from the top. The Yamaha YZ125 is one of the most popular motocross bikes ever made, which is likely why you bought it. Yamaha’s YZ125 has been a staple in the motocross world for decades but how does the newest generation fair in our world of modern four-strokes. Not to happy. If the air screw turns 2 or more turns then your pilot jet it too big and the engine is running rich at idle. We have also included a number of more modern Yamaha Dirt bikes on the assumption some of you may need this information in a convenient place. Your problem seems to be in the closed to 1/4 Nov 12, 2015 · 2006 yz125 with stock compression running 110 leaded 32:1 with yahamalube 2r. The only difference between the two was 2-1/2 inches in length. 1 The Yamaha YZ125 has had the longest production run of any MX bike in the world. The Yamaha YZ125 truly stands the test of time and now 15 years after its last major update, the bike still has the track credibility to win not just races but championships at any level. We developed these specs with a 32:1 fuel to oil mixing ratio of a 50/50 mix of race fuel and super unleaded, 0 - 1500 ft altitude at 70 degrees outside temperature. The manual says 30:1, but I run 32:1. The area we will focus is on the carburation n, Exhausts and light motor Work and some accessories. Instant download of the factory repair manual for the 2010 Yamaha YZ125 two-stroke bike. Once you have determined the correct jetting for your engine make a note of the temperature and altitude of your location at that time. these are recommendations only, based Posted in Reference. The bike runs great all the time with this jetting/premix ratio. Jul 03, 2020 · The jetting was good and Yamaha includes extra jets to dial it in for your locale. Two of the most popular pipes for a Yamaha YZ125 are the FMF Factory Fatty and the Pro Circuit Works pipe. FMF Factory 4. to . Thread starter MXP1MP; Start date Jan 30, 2002; MXP1MP. 4. Choose the nearest jet sizes to this number, in this case 160. Air screw at 1. Selector Calculator Numeric Altitude And Temperature Adjustment. if I put on a fmf factory fatty and a fmf shorty will I need to rejet? and will it be good? Baseline jetting, a place to start when rejetting . Still meets the 96DB sound limit and keeps you legal on the trails. Now, install the next size larger pilot jet and start from the beginning, adjusting the air screw. The articles I read said to run the jetting richer or you'll blow the motor. If you are curious as to the comparison of jet sizes between different brands of carb jets, the chart below should give some guidance. There are too many variables outside of FMF’s control to give you an exact configuration. As low as $475. These questions should be posted in Jetting Chat. For four-stroke bikes, our jetting specs are for premium pump gas at 0-1500 ft altitude at 70-85 degrees temperature. The pipe, next to porting, is the biggest factor to determining the power curve. Best money you will spend. The airbox plug is the big one holding back the bike’s performance. Price: Pipe $255. How To Test & Adjust The Pilot Jet Circuit Jun 17, 2004 · FMF Fatty pipe, does it tend to make the bike lean or rich? Anyway I know there are tons of variables to jetting, I just want to know which direction adding this pipe will take the bike. May 19, 2021 · Pro Circuit Works Pipe/R-304 Silencer (Kris’s Breakdown): The Pro Circuit Works Pipe and R-304 silencer has a deeper sound than the FMF/stock system and gives the YZ125 more bottom end than the FMF. I bought it from craigslist and then added a free flow air filter which i think made it leaner and now im going to put on a pro circuit pipe and silencer. While not the cheapest route due the cost of precisely stroking a crank - the additional displacement and EBR Jet Kit for Special Fuel. Member. Machine Exhaust Valves. YZ125 (05-08) DirtTricks front sprockets are constructed of through-hardened, shock-resistant die steel. #30 pilots, air screws 2. Jan 02, 2019 · Need help I have 17 yz125, vr4 reeds, FMF FATTY AND SHORTY, 93 octane with 32:1 yamalube, stock jets I ride in Southern California. We take a stock 2019 Yamaha YZ125 and see how much difference you can make by changing the standard exhaust to one of the pipe and silencer combinations from Jan 10, 2009 · My bike is STD bore and has a FMF fatty with a powercore II shorty silencer. Pipe. All of the jets are stock and the needle is in the stock position. He has a rad valveand stock pipe. 95 - $75. Any suggestions on proper jetting, Im new to two strokes so jetting is not my strong suit. . bike runs great no bogs at all with stock pipe and shorty, Im about to put on a FMF fatty and I bought a JD Jetting kit cause I have been reading on the forums a Jan 30, 2002 · '02 YZ125 Jetting update. It might be said that the 2016 YZ125 is Race Bike Rundown GYTR YZ125. N. Using weather conditions and your engine / carb configuration, the app will Jan 02, 2019 · Need help I have 17 yz125, vr4 reeds, FMF FATTY AND SHORTY, 93 octane with 32:1 yamalube, stock jets I ride in Southern California. com : LUSENET : New England Motocross Racing : One Thread Hi I have a 2000 yz 125 and I am going to by a pro circuit pape and silencer, I wax hoping you could tell me wich is the best pro circuit pipe, silencer and jetting combo for the tracks the nesc races. We pride ourselves on providing an exciting, innovative, and complete product line to fulfill the needs of professional racers and weekend riders alike. 00, silencer $111. BILLET COVERS. Australian owned, amazing service & fast free shipping* on over 100,000 products. Live. It’s a carbon steel system that has gone through FMF’s Tru-Flo stamping process for a proper fit and performance specs that target a broad powerband. James Dean purpose-built this jetting kit for riders looking to improve running performance and throttle response throughout the RPM range. Has an FMF pipe, no air. I think I want fmf pipe cuz more bottom end. The PC pipe/silencer has increased pulling power out of corners (mid-range) and just feels like it’s more torquey. Feb 09, 2021 · on a 2021 yz 125 what pipe and exhaust should I get, fmf or pc. EBR Head Modification. Yamaha YZ125 will improve rhe comptession damping of these forks. Most front sprockets sold today are "case hardened", meaning that only a thin outer layer of steel is hardened. Weight: 5. The result is pure art. Idle Jet Dell'Orto; rear brake cable Yamaha YZ 125 S-T, FMF Powercore Muffler Yamaha YZ 490 1987-1990 FMF Powercore Muffler Yamaha YZ 490 1987-1990. Moose Carburetor Repair Kit. com) or a GYTR jetting kit from your local dealer. Hard to give accurate info with out seeing the bike with jetting but I would suggest take a reading from the fuel air screw if the bike running better with the fuel air screw in carbi at 2. Yamaha YZ125: history, specifications, images, videos, manuals. Oct 29, 2012 · And now the throttle response is fixed. Yamaha is the only Japanese manufacturer still producing a 125 two-stroke motocrosser. It provides the best performance boost throughout. Go one size at a time till you get it right. Nov 28, 2015 · A Wicked Fast YZ125 big bore stroker. Mar 31, 2014 · The biggest difference between the two bikes was the '76 bike used a back of the cylinder reed valve design whereas the '74/'75 bike utilized a case reed engine. GRAND PRIZE. Yamaha and most manufacturers recommend using a ratio of 32:1, or 4 ounces of oil to 1 gallon of gas. 20 lb. FMF Gold Series Fatty Pipe Yamaha YZ125. FMF Factory Fatty pipe. Your tuning may require and adjustment hotter or colder heat range Yamaha YZ125 95-08, RD350/400, YFZ350 Banshee (87-06) & many 2-stroke ATV and Offroad Polaris Snowmobile 400XC/XCR with Mikuni TMX and Polaris 2-stroke ATV with VM carburetor. If you’re running out of power up top, want more time between shifts and do a lot of deep berm or sand riding, the FMF Rev is your pipe of choice. I recommend you jet up 10 to 12% to start and then you can back down from there. Open the power jet 1/8 or 1/4 of a turn. Feb 03, 2015 · A stock YZ125 pipe is still a good choice if you want to save money. Joined Nov 14, 2000 Messages 1,845 Likes Aug 09, 2010 · I've heard the FMF SST is the best pipe you can run on a YZ125. Vortex CDI, ECU & EFI products are designed to not just maximise your engines power output but to customise the power delivery to suit your riding style, capabilities and track conditions. KX . Forestry stamp of approval with the built-in spark arrestor in addition to the FMF exclusive "Turbinecore Dampening System. Buy your FMF Yamaha YZ125 05-21 Factory Fatty Exhaust Pipe online at MXstore. Apr 25, 2013 · 8/17/2018 6:05 PM. 95 . I had to lean the pilot 3 sizes the needle 1 clip and the main was ok and I am riding in 40 degrees. Note that different manufacturers sometimes use different profiles for the jet passage which can effect flow. What would be the optimal jetting settings for here in michigan?(0-1500ft) for the summer 70-80 degrees and right now in winter 10-35 degrees. Jun 12, 2019 · the FMF SST is a top end race pipe the fatty is more of a low to mid pipe. The main jet needs to go down by "-38" therefore the jet needed is 200-38 = 162. or by completing our contact form. 5 pilot. 1 RCT Mufflers and gives you max flow. I haven't taken off the carb yet but I will Mar 29, 2020 · The FMF set up doesn’t provide more over-rev over stock, but you will notice a healthier second and third gear pull down the straights. The new exhaust valve system was designed . They said: DEP's new YZ125/144 Torque system is designed to increase torque in the Boyesen Factory Racing Dirt Bike Parts. Aug 24, 2016 · The Scalvini YZ125 pipe has only one stamped section for the headpipe. It’s also good to keep low-end and mid-range power, which is great for trail riding. Tel : 951-245-2660 Fax : 951-245-2622 From 8. Jan 28, 2004 · I have the FMF Gnarleys which actually came with Fatty jetting instructions, and I have installed a twin air foam filter with foam outerwear which has pretty much the same flow as stock. The jetting was really close to stock and it seemed better all around on power We’ve complied a list of 10 important YZ125 facts that you might or might not know. Using weather conditions and your engine / carb configuration, the app will 1997-2004 YAMAHA YZ125 : riming and reduces rhe pOrT duration, plus increases rhe compression rario. Free to enter and an opportunity to win prizes every month! 3 chances to win regular product prizes from the Dream Bike collective! 1 chance to win the Grand Prize from KTM and Boyesen at the end of the program! ENTER NOW. But the weird thing is I reset the mixture screws and at 2 1/2 turns in it dies and the idle keeps going up all the way up to 4+ turns out. Here is what we've come up for in our area and is a great starting point for you as well. valve For the KX big-wheel fotks. EBR Cylinder Porting. he’s got a fmf gold series sst on it . Cookie Policy. Home FMF gnarly pipe, FMF shorty silencer, boysen dual stage reeds, UNI air filter YZ125 K: 1983: Mikuni Nov 26, 2013 · I have a 1999 yz125 with fmf fatty. $950. With well over 35 years of racing experience behind it, the FMF Fatty Gold Series Exhaust delivers race proven performance. The YZ125 runs much cleaner with the FMF pipe/silencer (compared to stock) and looks stealthy as the silencer is hidden behind the number plate. Jump to Latest Follow Status Not open for further replies. It’s up against stiff competition from Europe but the YZ125 still is Aug 09, 2021 · Pro Circuit Works Pipe/R-304 Silencer (Kris’s Breakdown): The Pro Circuit Works Pipe and R-304 silencer has a deeper sound than the FMF/stock system and gives the YZ125 more bottom end than the FMF. DEP 2 Stroke Pipes Add to Wishlist. YZ125(V) motorcycle pdf manual download. Racing Chain Moto-House MX - Choice of Champions - Located in Clermont/Groveland Fl. The silencer is simpler and uses carbon-fiber end caps. It works very well now i had tuned it whit Power jets parts Jan 09, 2017 · Uncorking/Jetting is removing the “plugs” that Honda intentionally puts on the bike to dumb it down. #1. 4 Stroke power when you need it 4 Stroke Boost Header Pipes. Sorry guys I haven't opened up the carb yet so I don't know exactly what jets are in it right now. 99 Buy. 5 turns mixture screw. FMF Gold Series Pipe, "Gnarly Desert"$251. It’s interesting how a perfectly ordinary Yamaha 125 can suddenly become the object of so much attention at the Feb 24, 2009 · On our first day of testing, the stock jetting worked well, but it was a bit rich off the bottom-end and midrange so we put a leaner main jet in, went one-half clip leaner on the needle and went Trying to jet a worn out engine is a waste of time. Calculated Main Jet Size. You need to lean everything out. $3. Apr 14, 2012 · 60. Below that layer is a core of soft steel. Dirt Bike Jet Kit. mini more comperirive with The RM but it takes tOO much energy . Welding like a race scarbeautiful and done with passion. 3. Personally I like the FMF stuff better. 99 - $83. 1. Not Intended for Street Use! DirtTricks YZ/ WR 250F Front Sprocket 2001-2012. HGS Exhaust Systems was formed in 1988, founder Henri Gorthuis had gained valuable experience and insight working as a Grand Prix Mechanic in the early 80’s. chances to win free stuff. Steve Petty dynoed a 1000 rear wheel Hp vehicle and increased the jetting 15% and the car made 1080 to the tire. $19. INTAKE . OFF IDLE to 1/4 THROTTLE: The SLOW JET and AIR SCREW are most effective in this range When you want a richer mixture use a larger SLOW JET or turn the AIR SCREW in. Add the two numbers together: -42+4= -38. We recommend Maxima Castor 927 High Performance 2-Cycle Oil. Boyesen Reed Cage As we part more bikes out we will add more information to this chart. 5. I. 5-125 main jets 12. We at Vortex are committed to Off Road riding and devote our efforts to making the best even better and making the worst the best they can be! Aug 02, 2020 · 1978 DT400 1975 DT250 1976 YZ125C (in progress) 1976 YZ125X (in progress) 2018 YZ250FX (my race bike) Feb 22, 2005 · 0. I only adjust the air screw +/- 1/4 from stock depending if it’s really cold or hot out. Jun 17, 2004 · FMF Fatty pipe, does it tend to make the bike lean or rich? Anyway I know there are tons of variables to jetting, I just want to know which direction adding this pipe will take the bike. 11/28/2015. It has been a main stay on the podium at junior nationals in recent years and even took out a world championship in 2018. You should copy and paste this list below into your reply. Please do not post jetting questions in this thread. COMPETITIVE PRICING We provide our partners fair and competitive pricing. When in taking off from the start the power is smooth then when is gets gets ready to go Mar 06, 2001 · Re: 2000 yz125 jetting. Dirt Bike Jet Repair Kit. wich I don’t think actually goes to this bike do to how it fits and when I google it fatty pipes only come up. Any help, suggestions or comments on this bog issue are more than welcome and greatly appreciated. I put a Factory Fatty and shorty on my 125. My own quad has big bore kit, Hotcams stage2 nose and ported head. Quote Quick Reply. All jet testing must be done with the engine at full operating temperature. The faster the track, the more this combination shined. My stock jetting is 127. I like that the FMF pipe comes with o-rings already installed and is ready to put on. The opposite holds true for a leaner mixture. He reduced the jetting to 7% and the car went 1079 to the tire. 00. YFZ w/pipe and lid off: JD blue needle #3 168m 45p 2. This 144cc kit rips - its needed to be competitive in the new AMA Mod class and maintains the stock reliability. Please note these are stock plugs. u may need something abit smaller maybe a 250 or 260. " The Turbinecore 2 silencer is a straight-through design that is less restrictive than stock for great track and trail performance. 161 pages. We use cookies to make your experience better. 99. The same goes for reeds that don’t seal properly, and a silencer that needs re-packing. NOTE – Advanced Options – You can just go with the default settings here as all motorcycles are factory set to run at sea level and at 20′ Celsius (68′ Fahrenheit). (FMF TURBINE 2) EXHAUST MUFFLER ON A 102MM BOLT CIRCLE - FITS 89 YZ 125 YZ250 YZ250WR Jun 02, 2021 · Dirt Bike Jet Kit. FMF's jetting on their site is for stock bikes. S. Buy your FMF Yamaha YZ125 00-01 Powercore 2 Shorty Silencer online at MXstore. I got on fmf's website but they do not have any jetting specs for a 00 yz 125. This database is for jetting setups on the CR,WR 125 / 144 / 150 bikes. racewear preview. Jan 30, 2002 #1. The chart below is informational only and probably only of use to custom builders. To comply with the new privacy regulations, we need to ask for your consent to set the cookies. When I say usable power, I mean that most riders can’t use all the Sep 12, 2003 · Now, for this next set of jetting you will need to buy either a James Dean jet kit(www. 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. Yeah but the jetting isn't stock right now, it is jetted for 5000' and I'm worried about burning up the motor cause it is too lean for my elavation. Insrail a see of Boyesen dual-srage reeds. It is beneficial to purchase a larger and smaller jet as the calculation is an approximation. rket . Features: Low and high altitude custom designed triple taper needles; Main jets included Aug 02, 2020 · 1978 DT400 1975 DT250 1976 YZ125C (in progress) 1976 YZ125X (in progress) 2018 YZ250FX (my race bike) Power-Up Jet kit for optimum performance on appliable models. Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Edited November 26, 2013 by 123jjbb Jan 03, 2017 · FMF gave us two $399. The pc seems to have better throttle response than oem. We’ve complied a list of 10 important YZ125 facts that you might or might not know. Pro-Racing makes a tuned afterrm. First, we Mar 24, 2015 · OK Lets start from the top. you can actually go on the fmf site and they recommend a jet to use with there pipe and its 270. The Yamaha YZ125 is already a great 2-Stroke Bike; it just needs a little TLC. Joined May 21, 2013 · 70 Posts Trying to jet a worn out engine is a waste of time. We take a stock 2019 Yamaha YZ125 and see how much difference you can make by changing the standard exhaust to one of the pipe and silencer combinations from A and D Discount Performance FMF DIRTBIKE FATTY PIPE YAMAHA YZ125 1996 - 1998 [78-1376 - 020147] - FATTY PIPEAll pipes are electro-nickel plated for a non-chip finish that will not discolor except the new Factory pipe which has hand pounded welds and no coating--just like the workd bikesNow available in Fatty for an all-around power increase throughout the power range, Gnarly for max low end Mar 23, 2010 · Yamaha FZ1. This video is about How to Jet a Dirtbike carburetor. Apr 24, 2012 · I found them to be alarmingly lean on my 01' YZ125 with their pipe, but when I had my '95 YZ250 years ago, their jetting was the same as stock with their pipe. A standard dirt bike should not need a power jet that is open more than 1 1/4 turns. 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. Rating: 100%. This is an 8% tuning window. Sep 07, 2016 · our dyno says the 2004 model pc pipe was better than fmf for 2004. Fits all FMF 4. The FMF Rev pipe focuses its power delivery in the middle and upper rpms of the powerband. 2021 KTM 250SX. YFZ w/pipe and lid off: GYTR needle #4 clip 168m 45p 2. KAW I KX80/85 . 99 . com [03-03 / #000346] YAMAHA YZ250 JETTING RECOMMENDATIONS Jan 30, 2020 · The YZ125 runs much cleaner with the FMF pipe/silencer (compared to stock) and looks stealthy as the silencer is hidden behind the number plate. 18033 S. Metering Rod Adjustment Tool. If you’re not able Aug 11, 2012 · Simply remove the bowl, unscrew the pilot jet, read the numbers on the side of it and get the correct jet. 1 - 2 of 2 Posts. FMF Power Up Jet Kit. YZ250(X) Individual Domes (1999-2021 YZ250 & YZ250X) from 80. D. The only other bike that can make a similar claim is the Yamaha YZ250 two-stroke. The pilot jet controls the fuel from closed to 1/4 and the main jet controls fuel 1/2 to 4/4 throttle. Pro Circuit Works Pipe/R-304 Silencer (Kris’s Breakdown 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. My jetting in it now is 1 step up on everything so 130-127. com [03-03 / #000346] YAMAHA YZ250 JETTING RECOMMENDATIONS Oct 13, 2017 · Hey need some help on what jetting kit or what jets are needed to get this bike running good, 04 Yz 125 clean bike, good compression, runs alright with a new plug, and after a day at the track go to start it the next day wont start, happens every time. Works Silencer. The newer, updated look of the 2015 YZ125 and 250 can be replicated on your older 2002-2014 model bikes with some simple plastic and airbox changes. My brother-in-law has a 2001 yz 125 and his jetting is 25 pilot,460 main. Our staff has over 65 years of championship-winning engine development experience formally educated by the World’s most renowned engineers. What year YZ125 is it. fmfracing. You should then convert your jetting to the baseline 1. com. We just built what I consider to be the fastest yz125 in the country. Noturbolag · Registered. Jul 12, 2010 · 2005-2010 Yamaha YZ125 Torque Pipe And Round Silencer. The YZ125 has been in Yamaha’s line since 1974. You name it and its in here. jdjetting. The 76 Type 1 reed valve engine had a lot of power in the mid range but for some reason would cut out / pop at high rpm in the bumps which was difficult to eliminate by jetting. This modification is 100% for Closed Course Competition Use only. It’s interesting how a perfectly ordinary Yamaha 125 can suddenly become the object of so much attention at the The FMF Turbinecore 2 silencer has earned the U. JD Jetting Jet Kit. Sep 01, 2021 · Just did a top and bottom on a 125 for my Niebor. Maybe my '01 was pig rich from Yamaha? Dunno. i have mine tweeekin and im still runnin a 270. 99 Powercore 2. Bud Racing USA Aug 17, 2018 · 99 Yz 125 Manual Pdf Ebook - Buddhalabs. I have one that I haven't installed yet. 99 – $314. 5 turns out or more then definitely increase pilot jet up 1 or 2 sizes if you get the bike to run well between one - two turns out on the fuel air GROMMETYear2002CategoryDirtbikeModelYZ 125 For over 65 years, Hideo “Pops” Yoshimura and his namesake company have designed and produced the finest exhaust systems in the world. Normally when you overbore an engine 15-20%, the slow jet will need to be richened and the main jet will need to be leaned. Covers complete tear down and rebuild, pictures and part diagrams, torque specs, maintenance, troubleshooting, etc. However by adjusting these settings will help you achieve a more accurate calculation. How To Test & Adjust The Pilot Jet Circuit Since the temperature is dropping -10°, chart number is "4". 95. 1 Review. Start with the stock jetting and make adjustments after you ride the bike. Of course a larger engine will need more fuel. Yamaha YZ125 service manual repair 2010 YZ 125. Apr 25, 2016 · We’ve complied a list of 10 important YZ125 facts that you might or might not know. We took it trail riding and he fouled 6 plugs. 4 ounces of oil to 1 gallon of gas. ba~e. Add to Wishlist. YZ125's that are used frequently for racing may benefit from a slightly richer 20:1 ratio, or 6. Remove Advertisements. When I say usable power, I mean that most riders can’t use all the Future Logistics, Inc. I just got a jd jetting kit and rebuilt the topend. Your problem seems to be in the closed to 1/4 Jun 05, 2013 · Hello I have a 2001 yz 125 and I think it is running to lean and I would like to jet it. Get a Manual for your model YZ 125. tips from pros. Race Tech Engines offer state-of-the-art, precision engine services and parts to all engine builders. 1 silencers to test to see which one would be better for them to put into production. 99 - $79. You probably did lose power down low with the SST but gained it up top as they are made for the fast 125 rider. Rocky Mountain ATV/MC sells a complete kit for the conversion. JET SIZES AVAILABLE Oct 29, 2012 · And now the throttle response is fixed. stock mikuni carb with a 350 main don’t see anything on the slow jet. SOURCE: Just bought a 2001 WR 426. Triplecrown421, May 20, 2012. For the 2005 and up yz 125, the fmf looks identical on dyno as oem, the shorty fmf with proper end cap can add over rev and a little peak, the pc pipe looses bottom, mid and power at stock peak hp rpm, then gains past that rpm. The Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. Boyesen Factory Racing Dirt Bike Parts. A pilot jet in simple terms really only meters fuel from the 0-1/4 throttle position. Since 1991, ProTaper has lead the way in premium control components. com Yamaha yz125 two-stroke bike. anything else we can think of! This fuel seems to be very friendly in jetting. chances to win autographed items. From brands like Pro-Circuit, Renthal, Twin Air, FMF Valves and D. Price: $14. i have a 2015 yz125,i race mx vets sand track,full rebuild. these are recommendations only, based Feb 03, 2015 · A stock YZ125 pipe is still a good choice if you want to save money. Whenever you race, you feel just like Tim Hart, standing on your foot-pegs, gripping the handlebars tightly, flying through the air, waiting to stick the landing. Aug 11, 2012 · Simply remove the bowl, unscrew the pilot jet, read the numbers on the side of it and get the correct jet. Also for: Yz125. It might be said that the 2016 YZ125 is May 24, 2011 · Pro circuit made my YZ125 go up to a 460 main, 4 sizes bigger than stock. dont kid yourself 290 sounds way too rich for just a pipe. Add to Wish List Add to Compare. A stock YZ 125 pipe won’t put out high peak horsepower numbers with a 144 kit, but you’ll have a lot of usable power. 1 RCT 96DB Full Flow Spark Arrestor. com tech@fmfracing. Jun 11, 2017 · 11 June 2017 / Text Size (-) (+) / Print. Aug 12, 2015 · The YZ125 is a great bike and one that Dirt Bike enjoyed even more with our list of our well-thought-out modifications. to Sizing Charts. FMF fatty pipe with powercore 2 silencer. There is a removable plug/snorkel at the top of the airbox and a removable diffuser within the tip of the exhaust which are both removed for this modification. com [03-03 / #000345] YAMAHA YZ125 JETTING RECOMMENDATIONS Sometimes stock jetting works fine, other times a slight adjustment is needed. RT specializes in optimizing flow and velocity by utilizing flow bench, dyno, and track testing. Specifications DIMENSIONS Overall length 2135 mm / 84,1 in Overall width Cracking the throttle is not enough to activate the power jet, so do not adjust it. 30am to 1pm and 2pm to 5. . May 25, 2016 · 0:00 / 13:55. Raising the needle by lowering the chip position at The Fatty is FMF’s branded two-stroke system and has been a staple for over three decades. Price: $59. I tooks FMF's advice on the jetting and shee runs great. Bore and Replate Cylinder. A and D Discount Performance FMF DIRTBIKE FATTY PIPE YAMAHA YZ125 1996 - 1998 [78-1376 - 020147] - FATTY PIPEAll pipes are electro-nickel plated for a non-chip finish that will not discolor except the new Factory pipe which has hand pounded welds and no coating--just like the workd bikesNow available in Fatty for an all-around power increase throughout the power range, Gnarly for max low end If you can remove the carburetor from your YZ125, you’re halfway to changing the reed cage, which is just a few more small bolts. 5 turns out, air box lid on (snorkle removed), needles in the stock position Step 2. It’s light, nimble and extremely forgiving; yet still plenty powerful. Our jetting recommendations are to be used as a guide only and were developed based on operation at sea-level at 70 degree ambient air temperature. View and Download Yamaha YZ125(V) owner's service manual online. what exhaust do u recommend. When in taking off from the start the power is smooth then when is gets gets ready to go Mar 16, 2012 · Hey there I have 2003 yz 125 I currently went under a big refurbish and had a new top end cylinder vforce reeds fmf fatty fmf shorty do I went up to a 430 main and kept the piolet stock now it hits really hard wich is great but it sputters a bit while accelerating it still goes put need to clean it out any ideas ? Jun 07, 2013 · Jetting chart. The following chart illustrates the adjustments required for changes in temperature and altitude. DEP S7R PIPE. The nickel-plated finish enhances durability, and it can be used with an FMF or stock silencer. Jetting for Yamaha YZ will help you configure the carb of your 2 strokes Yamaha YZ dirt bike (PW 50, PW 80, YZ 65, YZ 80, YZ 85, YZ 125, YZ 125 X, YZ 250, YZ 250 X) to improve its performance with no need of repair manual or owner's manual. POSITIVE: As you might expect, the Scalvini pipe on our YZ125 is a head-turner. Experience in Logistics For 30 years we have provided solutions our partners can count on. new product updates. •. Yes, the pipe comes with jetting instructions for my 00 YZ, but their parameters are meaningless. What I've read on several sites though is that the jetting recommendation on FMF's site are wrong. Price: $75. 2016 YZ 125 . Apr 02, 2005 · Ok, guys I just change my 125 back to stock bore with a sleeve and what not. make the . I want to say 350 pretty fat b Cookie Policy. 5 mains and 15 pilot. Santa Fe Ave Rancho Dominguez, CA 90221-5514 PH: 310-631-4363 FX: 310-900-5699 www. 00 condition of jet sizes on the chart. The corresponding jets will be listed in your manual. Add to Cart. Ignition Need help ? info@budracingusa. #5. 18033 S. We’ll discuss Jets and Needles and how that effects the performance of the bike. I am running stock, but down 2 on the main and the needle is down 1. Cracking the throttle is not enough to activate the power jet, so do not adjust it. 2000 yz 125,best pipe silencer and jetting greenspun. GEARING : Apr 02, 2005 · Ok, guys I just change my 125 back to stock bore with a sleeve and what not. 1/4 to 3/4 THROTTLE: The JET NEEDLE is the most effective component in this range. On Time Delivery Since 1992, we have been innovators of time-definite transportation. We’ll cover the tools you need to complete this project and give you the confidence you need to do this yourself. YAMAHA YZ125 JETTING With 14 years to iron out the bugs, Yamaha has the jetting down pat. Mar 29, 2020 · The Pro Circuit Works Pipe and R-304 silencer has a deeper sound than the FMF/stock system and gives the YZ125 more bottom end than the FMF. While not the cheapest route due the cost of precisely stroking a crank - the additional displacement and The table includes factory spark plug specs for all of the vintage Enduros the site is focused on. Worn reeds will mimic rich jetting, and worn rings will mimic lean jetting. 99 You save 10% Good fitting whit it`s own slip on muffler 4. Location: nova scotia. Feb 23, 2005. I dont wanna rejet do u think I have to. It might be said that the 2016 YZ125 is YZ125(X) Billet Cylinder Head Kit - 1 dome (2005-2021 YZ125 & YZ125X) from 200. You dont need to richen if your fouling plugs. Get the OEM pilot and main jets for your bike according to your riding conditons ie Humid/Hot or Cool. Instead, we stroked it 2mm, bored it 2mm, and made a 140cc mean machine. covers complete tear down and rebuild, pictures and part diagrams, fmf racing - yamaha yz125 jetting recommendations determine which settings work best when bolting on one of our pipes and silencers to a stock machine. And guess what - it's not your everyday yz144. If you are riding on the pipe and your bike feels flat, down on power, or excessively "pingy," your power jet may be lean. these are recommendations only, based Mar 19, 2002 · Mar 19, 2002. Jul 15, 2017 · Overbored cylinders produce higher intake velocity which draws more fuel through the carb. #14. 99$279. The best way to tell if it is your pilot jet is by adjusting the air screw. 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) 18033 S. WFO all day with no worries! Very little spooge and good plug color. Stock jetting was: Mainjet: 430 Pilot jet: 40 Needle: 6BFY43-3 Clip: 3rd from top Air Screw: 2-1/4 turns out What you are describing sounds more like a needle issue than a pilot jet issue. FLAWS: sluggish power FIXES: paning . 19 . I have a 2017 YZ250 with a vforce reed and fmf silencer and I just run stock jetting at 32:1. The goal is to list your carburetor settings and provide a brief conclusion of the results. Pre-mix the fuel with oil properly. 99 – $283. Aug 17, 2018 · 99 Yz 125 Manual Pdf Ebook - Buddhalabs. YZ Series. 30pm Monday to Friday.