1986-1987 Honda Fortrax TRX70 Service Manual, Page 53Get this manual
CYLINDER HEADIVAlVES Drive in the new valve guide from the top of the head Check to be sure the new guide was not damaged during in(1)
VALVE GUIDE DRIVER
stallation, then ream the guideTOOL:
Valve guide driver5.5 mm
077420010100 or 07942-3290100
Ream the new valve guide after installationNOTE Use cutting oil on the reamer during this operationRotate the reamer in the same direction when inserting and removing itRafsee the valva seatClean the cylinder head thoroughly to remove any metal parti-