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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
05 YZ250 Crank Seals
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[QUOTE="Morvo, post: 1229451, member: 64644"] Yeah, it's probably a good idea to pressure test the crank case just to make sure. Sounds daft, but you have checked the idle screw on the carb, made sure the throttle isn't sticking etc...? Also, check your exhaust valve actuator arm is moving in and out freely but with a nice springy return. If your exhaust valve is stuck open slightly the revs will build up more. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
05 YZ250 Crank Seals
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