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Everything Dirt Bike
Make / Model Specific
Yamaha
Power valve removed?
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<blockquote data-quote="Hondabro" data-source="post: 221028" data-attributes="member: 4921"><p>I had an 84 and an 86 yz-125, I know with out the power valve your port heights wont be adjusted for low-mid-upper power out puts. I know if that apple core valve is out of adjustment or incorrectly installed it could cause a piston strike, No Bueno! My 2 red devils also have power valves, and one had em' missing, that bike ran bad. I re installed em' and no more bad running issues. Try to keep it factory stock unless you are a performance bike mech.....</p></blockquote><p></p>
[QUOTE="Hondabro, post: 221028, member: 4921"] I had an 84 and an 86 yz-125, I know with out the power valve your port heights wont be adjusted for low-mid-upper power out puts. I know if that apple core valve is out of adjustment or incorrectly installed it could cause a piston strike, No Bueno! My 2 red devils also have power valves, and one had em' missing, that bike ran bad. I re installed em' and no more bad running issues. Try to keep it factory stock unless you are a performance bike mech..... [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Yamaha
Power valve removed?
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