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Everything Dirt Bike
Make / Model Specific
Honda
Honda CRF450 Knocking
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<blockquote data-quote="ossagp" data-source="post: 211930" data-attributes="member: 1650"><p>I think I would drain the oil in the crankcase and look for excess metal. That may be hard for you to know what excess really is. i would also remove the plug and look at it for damage or contact with anything. From there go to the valve cover and see if you have clearance at all 4. Then try adding some gas and restarting if you dont find any smoking gun(s). 12 years old if it is original, it could be well past the 'shelf' life where the valves, crankshaft, and cam chain are concerned.</p></blockquote><p></p>
[QUOTE="ossagp, post: 211930, member: 1650"] I think I would drain the oil in the crankcase and look for excess metal. That may be hard for you to know what excess really is. i would also remove the plug and look at it for damage or contact with anything. From there go to the valve cover and see if you have clearance at all 4. Then try adding some gas and restarting if you dont find any smoking gun(s). 12 years old if it is original, it could be well past the 'shelf' life where the valves, crankshaft, and cam chain are concerned. [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Honda
Honda CRF450 Knocking
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