2003 Yamaha YZ 250 "yz250 timing" Questions

2001 Yamaha YZ250. Engine compression on 01 YZ250? I have spark, I sprayed starting fluid in spark plug hole. My compression is at 120. It ran 2 days ago . Now nothing. Question edited for clarity, ...

The motor runs but wont powerband? (yz250) I have a yamaha yz250 and i just cant figer out why it wont powerband wen you rev it up it just spluters and sounds like your valebouncing it? could anyone ...

94 yz250 wont start,it has fuel,spark,comp but all it does is backfire every 3 kick or so I have tried clutch starting but that didnt work either!Can anyone help sounds like a seious timing issue

my transmission is leaking oil on my 2003 yz250 There is a front and rear seal on the tranny that tend to leak. Time to change the seals & gaskets..

1995 yz250 does not feel if it is going in to power band Make sure that you have a clean carb, but sounds like your powervalve is stuck. i have seen this on yz motors many times.

...in 01 and 03 motors for yz 250's.? thanks for 02 yamaha put the balky yz426f tranny in the yz250's, just for duribility tho....other than that yamaha manufactures might do a slite rejetting, ...