2007-2009 Honda TRX300EX TRX300X service manual, Page 130Get this manual
CYLINDER HEADVALVE
CYLINDER HEAD ASSEMBLY
VALVE canERS - SPRING RETAINER OUTER VALVE SPRING
INNER VALVE SPRINrG_
SPRING SEAT
VALVE GUIDE
EXHAUST VALVE
Blow through the oil passage in the cylinder head ith compressed airInstall the spring seats and new stem sealsLubricate each valve stem and valve guide inner surface with molybdenum oil solutionInsert the valves into the valve guides while turning it slowly to avoid damaging to the stem seal