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Everything Dirt Bike
Make / Model Specific
Yamaha
Yz 250 Crank Seals?
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<blockquote data-quote="Mihylo33" data-source="post: 174559" data-attributes="member: 408"><p>You aren't fouling plugs because of crank seals. If you were the smoke chasing you would be obvious. </p><p>Jetting is a good one and so is a worn top end. First clean that carb to eliminate any plugged jets and stuff. </p><p>Mix some gas at 32:1 and that will lean out your jetting a little bit. But if I had to guess I would say worn top end. Autozone will rent you a compression tester for free. Psi should be around 170ish.</p></blockquote><p></p>
[QUOTE="Mihylo33, post: 174559, member: 408"] You aren't fouling plugs because of crank seals. If you were the smoke chasing you would be obvious. Jetting is a good one and so is a worn top end. First clean that carb to eliminate any plugged jets and stuff. Mix some gas at 32:1 and that will lean out your jetting a little bit. But if I had to guess I would say worn top end. Autozone will rent you a compression tester for free. Psi should be around 170ish. [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Yamaha
Yz 250 Crank Seals?
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