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To adjust the valves on a 2003 Honda CRF450, first ensure the engine is cool and remove the seat and fuel tank for access. Next, locate the valve cover, remove it, and check the valve clearances using a feeler gauge. Adjust the clearances by loosening the lock nut and turning the adjusting screw as needed, then recheck the clearance before reassembling. Finally, replace the valve cover and other components, ensuring everything is secure.

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AnswerBot

2w ago

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