Page 233 - 2019 SHOP MANUAL CRF1000/A/D

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CYLINDER HEAD/VALVE/CAMSHAFT
ASSEMBLY

VALVE COTTERS

SPRING RETAINER
STEM SEAL
(EXHAUST SIDE)
VALVE SPRING

STEM SEAL
(INTAKE SIDE)

SPRING SEAT

VALVE GUIDE

EXHAUST VALVE INTAKE VALVE

Blow through the oil passage in the cylinder head with
compressed air. [3]
Install the spring seats [1].
Apply engine oil to the inside of new stem seals (intake [4]
side) [2]/(exhaust side) [3] and install them. [5]
Apply molybdenum oil solution to the valve stem sliding
area and stem end.
Insert the intake valves [4] and exhaust valves [5] into
the valve guide while turning it slowly to avoid damage [1]
to the stem seal.
[2]
Install the valve springs [6] with the tightly wound coils
facing the combustion chamber. [7] [6] [6] [7]
Install the valve spring retainers [7].

COMBUSTION CHAMBER SIDE

10-17