Sep 30, 2009 · YAMAHA YZ250F JETTING:FROM 2001-2009 (9/2009) As the original 250cc four-stroke of the modern era, the Yamaha YZ250F has the most development and refinement …

Jul 10, 2006 · Remove the seat and gas tank in order to have easy access to the valve cover. Remove the spark plug and the valve cover vent hose, then use a 5mm Allen wrench to …

Dec 10, 2020 · I finally thought I’d ask the forum about it, I’ve been running my yz250f for awhile with this “throttle position sensor” unplugged as that’s how I bought it off my buddy and it’s ran …

Jan 31, 2025 · Hello Sports Fans, WR250F and YZ250FX These are the two bikes I've narrowed it down to. I'm wondering if you can tell me the practical difference between them. I'm 50, 6"2", …

Oct 17, 2018 · Here are several FX maps, and my notes on how the map performed with the stock muffler. I preferred the Dirt Bike Test Map + IG in the woods, and the GYTR Hard map …

Oct 14, 2016 · Excitable, your confusing an engine/crankcase leakage test with a leak down test. Engine leakage test is done on a 2t at 8 psi with the ports and vents plugged off. You us this …

Jan 14, 2025 · Hello, I own a Yamaha WRF250, 2020. I bought a CCU and i wanted to plug it. but i dont find where. In the manual, it show a connector. but i didnt find the connector on my bike. …

Oct 17, 2018 · This is the spot to talk about the Yamaha WR250F, YZ250F, & YZ250FX. Find new & used WR250F and YZ250F/FX motorcycles & parts for sale, motorcycle reviews, and …

Oct 30, 2001 · What Oil is best for my 02 250f? I'm a tech at a yamaha dealer in massachusetts.Not a good idea to use motor oil designed for automobile use they have friction …

Apr 28, 2019 · If you take 2 seconds and either google it or search eBay you will find dozens of listings for big bore kits to fit the YZ250F engine. I have an FX with a 270 big bore. There is a …