1986-1987 Honda Fortrax TRX70 Service Manual, Page 55Get this manual
CYLINDER HEADVALVES Apply thin c08ting of Prussia" Blue to the valve seat(1)
CONTACT TOO HIGH
Without rot8ting the v81ve, insert it through the valve guide and onto the seat 10 make clear patternNOTE
The location of the valve seat in relation to the valve face is very important for good sealingIf the contact area is too high on the valve, the seat must be
:J;ATW(TH =1SEATW(OTH
CONTACT TOO lOW
lowered using 32 flat cutterIf the contact area is toal low on the alvethe seat must be
raised using 60 inner cutter Refinish the s8at to specifications using 45 seat cuner
After cuning the seat, apply lapping compound to the valve face and lap the valve using light pressure