CYLINDER HEAD
1. Eliminate:
- Carbon sediments (from the combustion chamber) Use a
rounded spatula.
N.B.:
AVOID USING ANY SHARP EDGED INSTRUMENT THAT CAN
CAUSE DAMAGE AND SCRATCHING.
- IN THE SPARK PLUG THREADS
- ON THE VALVE SEATS.
2. Inspect:
- Cylinder head
Wear/damage => Renew.
Steps for measuring distortion and for rectification:
Place a ruler (1) and a thickness calliper (2) on the head
cylinder surface, as in the figure to the side.
- Place a 400 ~ 600 emery paper on a flat surface and rec-
tify the surface of the cylinder head by making figure eight
movements.
N.B.:
TURN THE CYLINDER HEAD SEVERAL TIMES TO PREVENT
EXCESSIVE MATERIAL FROM BEING REMOVED FROM ONE
SIDE ONLY.
48
INSPECTION AND REPAIR
WORKSHOP MANUAL
Summary of Contents for DSR EX 125
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