Mar 29, 2008 · What is the right gearbox oil to use in an YZ250 2st? Is 10w-40 4st oil ok to use in the gearbox? Or should you use something heavier?

Jul 26, 2008 · Made this a little project to help TT'ers with detonation and timing factors. This came about for two reasons. One, there were people running the exact same fuel, config and alt/temp while one would get ping (detonation) while another would not. Two, since many people have timing lights in their ...

Apr 18, 2007 · Home Forums Dirt Bikes Make / Model Specific Yamaha Motorcycles Yamaha 2 Stroke yz250 year to year changes?

Dec 29, 2017 · What an awsome kit ! so I got caught up in looking at dyno charts and reading pretty much every thread on this kit before committing to it. They dyno guy kinda harped on it. Definately doesnt go with my experience with the kit. Ive always loved the versatility and fun factor a yz250 2 stroke has ...

Aug 10, 2020 · I've owned the Gnarly and Fatty for my YZ250. For me, a slow Senior C offroad guy, I found the stock pipe with the FMF Turbine Core sparky was the best combination on tight technical trails. The Gnarly hit harder down low, and honestly way more that I needed or wanted. I was more comfortable with the OEM pipe. Sold the FMF's and found a back up OEM …

Mar 6, 2021 · I'm starting this thread to serve as a place to ask questions about Apex Technical Innovations cylinder heads (yz250, yz250x, yz125, yz125x). 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 di...

Jan 20, 2024 · All Activity Home Forums Dirt Bikes Make / Model Specific Yamaha Motorcycles Yamaha 2 Stroke New Electric Start from Fisch Moto

Apr 16, 2014 · 2005. The old steel frame was dropped for a creative plug-and-play aluminum design that was four pounds lighter than the 2004 steel frame. In fact, the 2005 YZ250 was 7-1/2 pounds lighter than the 2004 YZ250. Additionally, the 2005 YZ got Honda -style front brake-hose routing and Renthal 7/8-inch aluminum handlebars. 2006.

Oct 21, 2020 · I have a 2020 Yamaha YZ-250X and I am installing a Boyesen Rad Valve. I just tried to call Boyesen but they are closed. I want to know if I remove the spacer or leave the spacer in, the instructions do not mention the spacer. My engine is stock, but I have installed the GYTR Flywheel Weight and a...

Sep 26, 2010 · If you are riding a late model YZ250, 14/51, which is one tooth up on the rear, is a great gearing for motocross applications, on all the but the fastest motocross tracks. What year model YZ do you ride.