Inspecting The Cylinder Head; Inspecting The Timing System Components - Derbi GP1 125-250 c.c. Workshop Manual

I I
NSPECTING THE CYLINDER HEAD NSPECTING THE CYLINDER HEAD
- Using a rectified bar and a thickness gauge, check that the
head surface exhibits no deformations or wear.
- Check that the camshaft and the rocker pin capacities ex-
hibit no wear.
- Check that the head cover, the exhaust manifold and the
intake manifold surface exhibits no wear.
I I
NSPECTING THE TIMING SYSTEM COMPONENTS NSPECTING THE TIMING SYSTEM COMPONENTS
- Check that the guide sliding block and the tightening sli-
ding block are not too worn.
- Check that the camshaft and pinion control pulley chain
unit exhibit no wear.
- In case of wear, replace the parts. In case of wear of the
chain, pinion and pulley, replace the entire unit.
- Remove the central screw with the washer and the tightener
spring. Check that the unidirectional gear is not worn.
- Check the integrity of the tightener spring.
- In case of wear, replace the entire assembly.
117