Valves; Valve Inspection - Honda TRX90X Owner's Manual

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Valve Inspection

Refer to Safety Precautions on page 94.
Valve clearance should be:
intake: 0.05 mm (0.002 in)
exhaust: 0.05 mm (0.002 in)
Excessive clearance will cause noise. Insufficient clearance will cause
loss of power and possibly damage the valves.
For those who are mechanically proficient and have the proper tools,
instructions on adjusting valve clearances are given in the official
Honda Shop Manual. Otherwise, the valves should be adjusted by
your dealer.

Valves

Servicing Your Honda
127