Help My 2006 Yz250f won’t start but has fuel, air and spark

Snowracer5

Member
Jan 15, 2022
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My 2006 Yz250f won’t start, it has fuel, spark And air. I clean the carburetor and replaced the spark plug, I can push the kick start by hand with 2 finger, does this mean I need to replace my top end? Or is it something else
 

RM_guy

Moderator
Damn Yankees
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Nov 21, 2000
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Check the compression and valve clearance. Pushing the kick starter that easily isn't a good sign and could be caused by worn rings or the valves not sealing.
 
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