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What is the factory compression range for the 1991 VX 250 Yamaha. I'm getting ready to upgrade to one that is used and wondered what I should be looking for.
D-,
I'm gonna guess - somewhere in the range of 100-120 psi.
But more importantly, you want all cylinders within 5% of each other.
Good luck [img]smile.gif[/img] ,
Ken K
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