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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
CR450F Top End Update
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[QUOTE="P. Pinestraw, post: 391435, member: 23946"] I know a guy who races a CRF450 in THREE off-road race series and, including practice, has put over 160 HARD hrs. on the bike & hasn't even adjusted the valves. He plans on adjusting the valves in late July & replacing the piston and rings about X-Mas time or thereabouts. By the way, he is a "B" or intermediate rider. Very fast & highly skilled. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
CR450F Top End Update
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