Valves - Honda FourTrax Recon TRX250TM 2019 Owner's Manual

Valves

Valve Inspection
Refer to Safety Precautions on page 79.
Valve clearance should be:
intake: 0.005 in (0.13 mm)
exhaust: 0.005 in (0.13 mm)
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 Service Manual. Otherwise, the valves should be adjusted by
your dealer.
116 Servicing Your Honda