2006-2009 Honda TRX250EX/TRX250X Service Manual, Page 138Get this manual
CYLINDER HEADIVALVECAMSHAFT After cutting the seat, apply lapping compound to the valve face, and lap the valve using light pres-
sureNOTE:
Excessive lapping pressure may deform or dam Change the angle of the lapping tool frequently to prevent uneven seat weare Do not allow lapping compound to enter the guides
age the seat
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After lapping, wash any residual compound off the cylinder head and valve and recheck the seat con-