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, ...

Apr 12, 2024 · I see two different plugs: the one for the YZ250F is a colder plug (LMAR9EJ) than the 250FX (LMAR8EJ). I've had the ECU flash done to correct the plug fouling issue (which wasn't really that big of an issue with the bike - still takes a second of holding start button to crank over).

Oct 29, 2024 · 2019 yz250f diagnostics code 22. By Pavel Vladimirov, October 29, 2024 in WR250F/YZ250F/YZ250FX. Share

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).

Jun 22, 2018 · Hi all, I purchased a 2001 yz250f for my son. Previous owner put a new carb on it but it's a Chinese Keihin copy. Needless to say, it runs like crap. I've decided to not be bothered with the cheap carb and buy a used authentic Keihin. I purchased a carb off a 2006, mainly for the fact that it has...

Mar 25, 2010 · green antifreeze mixed 50/50 with water will work just fine. you can buy it premixed or you can buy it straight and mix it your self. a gallon of 50/50 is about half the cost of a gallon of straight because obviously you are buying half a gallon of antifreeze and half a gallon of water. don't ever mix orange and green antifreeze they will coagulate and cause all sorts of problems

Jul 18, 2010 · Stage 1 are better for low-mid and stage 2 are mid-top. The gains aren't necessarily offset by a loss at the other end, but with the HUGE increase in low-mid of the 290, I would stay away from the stage 1 and get the stage 2, or just do the 290 and call it good, the increase is probably more than you are expecting.

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 test to find case seam leaks, base gasket/head gasket leaks, seal leaks, and just a

Feb 1, 2021 · Going by your forum profile name and posting history, this is on a 2006 Yamaha YZ250F, correct? 'assuming' will get you making expensive mistakes, stock OEM intake valves are Titanium, lapping them will remove a very thin hardened coating and make them wear out much faster. Edited February 1, 2021 by mlatour

Dec 10, 2024 · i have a 21’ Yz250f with 45 hours on it. one day i start my bike like always and let it warm up while i grab my helmet. After a minute or so it dies out. After wards it cranks all day long but will not catch and start. Ive changed the plug, check valve clearance, cleaned out line and added fresh fuel. I also check pressure on fuel pump and ...