Suzuki DR650 Valve Adjustment Page
Valve adjustment is an important routine maintenance task that is beyond the skill or comfort level of most riders, but isn't that difficult to do.
Here are the instructions from the Suzuki Pre DR650 Maintenance Manual:
Excessive valve clearance results in valve noise and insufficient valve clearance results in valve damage and reduced power. At the distances indicated above, check and adjust the clearance to the specification.
The procedure for adjusting the valve clearance is as follows:
Valve clearance is to be checked when the engine is cold. Both intake and exhaust valves must be checked and adjusted when the piston is at Top-Dead-Center (TDC) on the compression stroke.
09900-20803: Thickness gauge
Both right and left valve clearances, should be as closely set as possible.
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