1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 79Get this manual
CYLINDER HEADVALVES Apply thin coating of Prussian Blue to the valve seatWithout rotating the valve, insert the valve through the valve guide and onto the seal to make clear patternNOTE
The location of the valve seat in relation to CONTACT TOO HIGH CONTACT TOO lOW
the valve face is very important for good
sealing ,
If the contact area is too high on the valve, the seat must be lowered using 32 degree flat cutterIf the contact area is tool Iowan the valve, the seat
must be raised using 60 degree inner cutterRefinish the seat to specifications using 45 degree