1986-1988 Honda TRX 200SX Fourtrax Service Manual, Page 62Get this manual
CYLINDER HEADvALVES Ream the ew valve guide after Inst lIaTion (1) VALVE GU IDE REAMER
TOOL: Valve guide reamer
079842000000 or 079840890000
Use cutting oi all he reamer during th is operationAlway rota the reamer clockwise, never counte rclockwise
Clean the cylinder head thoroughly to remove any melal panicles Reface the valv seat
VALVE SEAT INSPECTIONREFACING
Clean the IIltake and exhaust valves thoroughly to remove carbon depOSits Apply light coating of Pruss ian Blue to the valve seatsLap the valves and seats using rub ber hose other hand -lapP ing tool Remove and inspect th valves