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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
Power Valve Stuck Open (02 CR250r)
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[QUOTE="goblue12n0, post: 1302078, member: 80137"] [b]Thanks to all and Update[/b] All, Thank you for your advice! The bike is still apart. The rod and the bottom end are within specification and appear solid. The knock sound was the actual exhaust power valve / flap. For whatever reason the flap was goining up and down as the bike was in low idle and it was slapping against the top / bottom of the exaust valve casing within the cylinder / jug thus, causing the knocking sound. This knocking actually created significant recesses in the bottom of the exaust valve casing. I took the cylinder / jug to Honda after removal. They (Honda) contacted support and indicated that they had put the wrong cylinder on the bike after rebuilding it 2 years ago. Our local Honda dealer, Noblesville Honda, has offered to replace the entire top end and properly adjust the power valve (RC) controls. So, for those of you with 2002 CR250R bikes add this to the long list of things that could be a problem. It should also be noted that since the rebuild by Honda 2 years ago, when the power valve began malfunctioning, the bike started spooging. I modified the jetting significantly and could never eliminate the spooging problem completely. [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
Power Valve Stuck Open (02 CR250r)
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