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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
1982 250yz power valve
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[QUOTE="whenfoxforks-ruled, post: 1400492, member: 73147"] WFO means wfo on the exhaust valve also. Off idle, smaller area means better bottom end. If you really want to learn, the shop manual for that bike is in order. After that, check out the books from Eric Gorr at Forward Motion. If you are still interested, check out Professor Blair. If you are too thrifty to buy a owners manual, how on Earth are you going to keep it going/routine maintenance? I am as cheap as it gets! And sorry, I do not have a manual for that bike. A parts micro fiche can help, but there are specs in the book, and some parts have to be put in in sequence and lining up timing, of sorts. The exhaust valves on some 2 strokes can get pretty complicated, and finicky about being put in wrong. Vintage Bob [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
1982 250yz power valve
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