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CYLINDER HEAD
ENG
NOTE:
NOTE:
NOTE:
NOTE:
YP401030
CYLINDER HEAD REMOVAL
1. Align:
S“I” mark
a
on the rotor
(with stationary pointer
b
on the crank
case cover)
Turn the primary sheave counterclockwise with
a wrench and align the “I” mark
c
with the cylin-
der head match mark
d
when the piston is at
TDC on the compression stroke.
2. Loosen:
SBolt
1
3. Remove:
STiming chain tensioner assembly
STiming chain tensioner gasket
4. Remove:
SBreather plate
2
SCam sprocket
3
STiming chain
4
D Fasten a safety wire to the timing chain to
prevent it from falling into the crankcase.
D Remove the bolt
1
while holding the rotor
mounting bolt with a wrench.
5. Remove:
SCylinder head
D Loosen the nuts in their proper loosening se-
quence.
D Start by loosening each nut 1/2 turn until all
are loose.
YP402000
CYLINDER HEAD INSPECTION
1. Eliminate:
SCarbon deposits
(from combustion chambers)
Use a rounded scraper.
Do not use a sharp instrument to avoid damag-
ing or scratching:
D Spark plug threads
D Valve seats