2008 Honda Aquatrax ARX1500T3/T3D factory service manual, Page 268Get this manual
CYLINDER HEADIVALVE After cutting the seat, apply lapping compound to the valve face, and lap the valve using light pressure
Excessive lapping pressure may deform or damage the seatChange the angle of the lapping tool frequently to prevent uneven seat wearDo not allow lapping compound to enter the guides
After lapping, wash any residual compound off the cylinder head and valve and recheck the seat contact
CYLINDER HEAD ASSEMBLY