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Everything Dirt Bike
Make / Model Specific
Yamaha
2003 yz250f not starting
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<blockquote data-quote="ossagp" data-source="post: 163579" data-attributes="member: 1650"><p>You might check to see if your tensioner came loose and let the cams jump timing. Compression is a good place to start and I think I would take the cover off and see if you have clearance while you check your valve timing. </p><p></p><p>just to make sure it isnt the victim of a plugged up carburetor you may want to drop a little bit of gas down the spark plug hole and see if it starts, even if just momentarily. </p><p></p><p>It has happened very few times to me, but I generally disconnect the kill button at the coil if it still doesn't start. I have had two or three times where I got spark with the plug out, but couldnt make it fire with the plug in. a momentary interuption at the kill device was the culprit. Just thinking in print.</p></blockquote><p></p>
[QUOTE="ossagp, post: 163579, member: 1650"] You might check to see if your tensioner came loose and let the cams jump timing. Compression is a good place to start and I think I would take the cover off and see if you have clearance while you check your valve timing. just to make sure it isnt the victim of a plugged up carburetor you may want to drop a little bit of gas down the spark plug hole and see if it starts, even if just momentarily. It has happened very few times to me, but I generally disconnect the kill button at the coil if it still doesn't start. I have had two or three times where I got spark with the plug out, but couldnt make it fire with the plug in. a momentary interuption at the kill device was the culprit. Just thinking in print. [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Yamaha
2003 yz250f not starting
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