Suzuki RM-Z450 Owner's Service Manual page 115

6-18 CYLINDER HEAD, CYLINDER AND PISTON
• Install the valve spring with the small-pitch portion A facing
cylinder head.
• Put on the valve spring retainer 2, and using the valve lifter,
press down the spring, fit the valve cotter halves to the stem
end, and release the lifter to allow the valve cotter 3 to
wedge in between retainer and stem.
# 09916-14510: Valve lifter
09916-14521: Valve lifter attachment
09916-84511: Tweezers
• Be sure that the rounded lip E of the cotter fits snugly into the
groove F in the stem end.
• Install the other valves and springs in the same manner as
described previously.
Be sure to restore each spring and valve to their origi-
nal positions.
Be careful not to damage the valve and valve stem
when handling it.
• Install the tappet shims and the tappets to their original posi-
tions.
NOTE:
* Apply engine oil to the stem end, shim and tappet before fitting
them.
* When seating the tappet shim, be sure the figure printed sur-
face faces the tappet.
A Small-pitch portion
B Large-pitch portion
C UPWARD
D Paint
CAUTION
4 Valve spring retainer
5 Valve cotter