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 time of any bike of the track. Its jetting specs have evolved slowly over the last nine years (and the 2009 model isn’t all that different from the 2001 YZ250F).

Apr 27, 2020 · Hey Everyone, I have just purchased a new 2020 YZ250f, and was looking for a recommendation on oil. I have put about 1 1/2 hours on it, getting ready for first oil change, and I am interested in what you guys think in terms of straight …

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", 280 lbs. I'll be sticking mainly to fire roads until I get in shape, and get the suspension done. I can ride a motorcycle, ...

Dec 5, 2017 · My Bike: 2014 YZ250F GYTR head, FMF Ti Exhaust, 51 hours. Primarily ride track and race C Class (8-10 events per year). Work performed this time on the bike: Timing chain, a new 2015 stock piston, wrist pin, rings, and wristpin …

Jun 1, 2021 · Hi everyone. I've got a new 2020 WR250F, Australian model, with competition kit fitted (throttle stop removed, larger exhaust outlet fitted, airbox mod, competition switchable ECU etc.) Been on a few rides and very happy with it. Now that it's run in I'm starting to play with maps. When I downloa...

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 remove the valve cover. Use a quarter, a big flat head screw driver or a pair of needle nose pliers to remove the 2 caps to check for t...

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 on the MX track and sand.

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 modifiers this can ruin clutches very fast.I like Motul,silkoline,yamalube,spectro,ect,just make sure they are motorcycle oils for wet clutch systems all these should work fine.Yamaha doesn't recomend using synthetic oils.I use ...

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 fine. I’m now just trying to give her some love and figured the engineers at Yamaha didn’t put it on for no reason. So just asking if anyone knows ...

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. can someone who own 2020 and install a CCU help me with it? Thanks