Installing The Valves; Specific Tooling - APRILIA RS 125 Euro 4 Service Manual

Engine
•
Check that the camshaft bushings are not worn.
•
Check that the head cover surface, the intake manifold and the exhaust manifold are not
worn.

Installing the valves

•
Lubricate the valve guides with engine oil.
•
Position the two oil seals on the cylinder head.
- Fit the valves, the springs and the caps. Using
the specific tool, compress the springs and fit the
cotters in their seats.

Specific tooling

020382Y011 Valve removal/installation tool
Timing
Checking the chain tensioner
•
Remove the centre screw with the
washer and the tensioner spring.
Check that the one-way mechanism is
not worn.
•
Check the condition of the tensioner
spring.
•
Replace the whole unit if any wear is
found.
ENG - 210
RS 125 - Tuono 125 - Euro 4