Removing The Valves - Derbi boulevard 125 4t Workshop Manual

Engine
MOVING THE CHAIN AND THE DRIVING
SHAFT CHAIN TIGHTENER.

Removing the valves

- Using the specific tool fitted with the element
shown in the figure, remove the cotters, the plates
and the spring between the valves.
Specific tooling
020382Y Valve cotters equipped with part 012
removal tool
020382Y011 adapter for valve removal tool
- Remove the oil seals with the appropriate tool.
- Remove the lower spring supports.
Specific tooling
020431Y Valve oil seal extractor
Removing the cylinder - piston assy.
- Remove the chain guide pad.
- Remove the cylinder base gasket.
CAUTION
TO AVOID DAMAGING THE PISTON, SUP-
PORT IT WHILE REMOVING THE CYLINDER.
ENG - 108