Question about 2003 Honda CRF 450 R
Find a mechanic who knows how to use a compression leakdown tester. No other work should be performed until after you check to see if compression is leaking past the valves. If so, then clearance checking can confirm a wear problem or adjustment problem.
Posted on Feb 17, 2010
Need to check valve clearence, valves to tight, i have a yz450 you need a shim kit to adjust valves
Posted on Feb 04, 2010
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Posted on Jan 02, 2017
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