1994 yamaha timberwolf wont start

[Bigal700]

I got a 1994 yamaha timberwolf that 2 years ago i bought put carb on off a parts one had it running but not the best so i rebuilt the carb seemed to run good then i left it sit i wanted to ride it so,i took carb apart to clean it looked good had it running but wouldn't idle not a big deal then it died so i gave up on now trying to start wont do anything i checked spark looks good, has great compression and its getting gas i sprayed starter fluid in it and it still wont do anything what the heck could be wrong?

[oxidized_black]

valves may not be in sequence, need to adjust ...

[Bigal700]

Checked there good

[oxidized_black]

how good is the spark? when turning over the spark should be rapid and brilliant blue ... if not and it hiccups or not completely blue, could be stator and/or pick up coil ...

[Bigal700]

I changed coil off one that runs and it looks kinda white the spark but it don't look bad i looked at the other one and it looked about the same

[oxidized_black]

the stator makes the spark, it is inside the cover by your left foot sitting on the bike, it is an easy fix, the spark being white is weak, if changed it will be blue. stator and pick up coil are sold together, both inside the cover, you might be able to buy just the pick up coil and try that, sometimes that is all that goes on them ...

[Bigal700]

Ya i think i mite replace the stator and yea i know where its at

[oxidized_black]

i had the same problem on a 91 big bear and changed it out and never had to look back. from what i heard, yamaha had stators that didnt hold up that well. but the aftermarket ones are the way to go. ebay has alot of good deals on them ...

[Bigal700]

I looked i can get one from any where for the same price i got two more timberwolfs the same year the one i ran it to the ground it ran but cam chain stretched and i never had to replace stator and the other one looked like a new machine when i got it iv had great luck with that one

Edited July 25, 2014 by Bigal700

[Bigal700]

Ok i pulled stator out of parts machine and i pulled carb from one i have that runs good but as soon as it gets warm it dies i thought maybe something wrong with carb when i pulled it so i took it off myn and put it back on running one and that one ran great so there's something still wrong with myn wat could it be?

[Bigal700]

Ok now i pulled stator out of my junk wheeler that run but cam chain stretched on and i pull carb off of my running timberwolf and it idles and revs up but once it gets warm it dies and wont start again what could this be? Its not carb pulled it back off myn put it on running wheeler and it runs great so something is still wrong with myn

[oxidized_black]

coil maybe breaking down when hot, after it cools it will start again ??

Edited July 28, 2014 by oxidized_black

[Bigal700]

Yea

[gears]

leakdown/compression test might be ok to start run but once it warms up too little compression to run.

[dtbprc]

fuel tank vapor lock? is tank clean and is vent out of top of gas cap clear? my lt160 did same and that was the issue. also check vacuum lines from carb to airbox and motor.

[Owem Tarmer]

Does the temberwolf have a oil safety that would keep it from starting? 

[spock58]

Not that I've ever heard of, just an idiot light for low oil pressure on most Yamaha's.