Fmf jetting yz125. YAMAHA YZ125 JETTING RECOMMENDATIONS Here are our jetting suggestions for your YZ125. Please keep in mind FMF's jetting specs are based on a stock motor with an FMF pipe. Aug 25, 2023 · 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. Hey everyone, I have a 2015 yz 125 with oem exhuast,v force reed valves and oem jetting,the bike runs perfect as it is but I'm getting an fmf fatty and shorty exhuast tomorrow and was wondering will I need to re jet it? Installing a new FMF pipe and silencer along with a JD jetting kit on our 2024 YZ125. I split the cases to find a main bearing grenaded and fixed that and now I am in the process of reassembling the motor. But keep in mind we have almost zero humidity. 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 Home - ThumperTalk Shop official FMF Racing dirt bike & ATV mufflers and exhaust parts, exclusive apparel, t-shirts, hats, goggles, and sunglasses here. This jetting works awesome for me i have great power everywhere with NO bog or hesitation. . I also have done the O-ring mod with a 1/8 thickness o-ring, installed a boysen quickshot accelerator pump cover, put in a boysen powerblade on the air boot, and cut out the screen on the air filter cage. These are recommendations only, based upon our testing at sea-level atmospheric pressure, a 65-80F degree ambient air temperature, a 32:1 fuel to oil mixing ratio Installing a new FMF pipe and silencer along with a JD jetting kit on our 2024 YZ125. The bike does have an fmf fatty and power . 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 machine. I ride in AZ usually from 2500-5000 feet. Here are our jetting suggestions for your YZ125. I have a 1999 yz125 with fmf fatty. aftermarket ignition module). Two of the most popular pipes for a Yamaha YZ125 are the FMF Factory Fatty (Motosport) and the Pro Circuit Works (Motosport) pipe. Mar 11, 2024 · I've got a 96 yz 125 with a fmf fatty pipe and power core 2 exhaust. 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. With the stock pipe and reeds, stock jetting was very good (410 main FMF Racing is not responsible for problems derived from improper jetting and/or usage. Other aftermarket motor parts may affect these specs; you would need to contact the manufacture in question for their jetting specs as necessary. While waiting on parts, I started to clean the carb and saw that the main jet was a 360. Apr 1, 2008 · I have an 06 YZ125 also. I am running stock engine, Boyesen Pro reeds, FMF factory fatty, FMF power core silencer (not the shorty). We are really hoping this will solve are jetting problem with this bike. Jul 9, 2025 · YZ125 Pipe upgrade - which is best for you? The pipe, next to porting, is the biggest factor to determining the power curve. I have tried just about everything with the jetting and have found combos that work really well for me. Kris Keefer tested both of these with a respective shorty silencer from FMF and Pro Circuit. James Dean purpose-built this jetting kit for riders looking to improve running performance and throttle response throughout the RPM range. Free Shipping on orders over $50. I just got a jd jetting kit and rebuilt the topend. Bike RIPS now! 2 months later All Activity Home Forums Dirt Bikes Make / Model Specific Yamaha Motorcycles Yamaha 2 Stroke YZ250 Ultimate Jetting Thread Facebook Twitter Youtube Instagram Pinterest Newsletter FMF took the time to develop and refine their Turbine Core 2 muffler to specifically match the different compression ratio and powervalve timing as well as keep the off-road power style the YZ is so good at producing. Proudly made in USA. Hey everyone, I have a 2015 yz 125 with oem exhuast,v force reed valves and oem jetting,the bike runs perfect as it is but I'm getting an fmf fatty and shorty exhuast tomorrow and was wondering will I need to re jet it? Some people are saying there's no need and others are saying it's a must. We also changed our 2 stroke oil and Aug 25, 2023 · 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. Always check that your jetting is correct when changing parts that could affect the intake system, exhaust system and any product or change that could alter fuel combustion in the cylinder (ie. I'm wanting to upgrade the reed box to a v force 3 and was wondering what sorta difference I should see in power and if I should plan on jetting the carbs. So I was given a 94 yz125 that was locked up. vli iaz jpj wti oxz jxa jzx owo gup edi ovs xab vyz pdz zgc