Removing The Cylinder Head; Removing The Valves - PIAGGIO MSS X9 Evolution 250 Workshop Manual

Engine

Removing the cylinder head

- Remove the spark plug.
- Remove the 2 side fixings shown in the figure.
- Loosen the 4 head-cylinder fastening nuts in two
or three stages and in criss-cross fashion.
- Remove the head, the two centring dowels and
the gasket.
N.B.
IN CASE OF NEED, THE HEAD MAY BE REMOVED WITH
THE CAMSHAFT, PINS, ROCKING LEVERS AND FIXING
BRACKET. THE HEAD CAN ALSO BE REMOVED WITH-
OUT REMOVING THE CHAIN AND THE DRIVING SHAFT
CHAIN TIGHTENER.

Removing the valves

- Using the appropriate tool fitted with an adaptor,
remove the cotters, caps, springs and valves.
- Remove the oil guards with the appropriate tool.
- Remove the lower spring supports.
CAUTION
REPLACE THE VALVES IN SUCH A WAY AS TO RECOG-
NISE THEIR ORIGINAL POSITION ON THE HEAD.
Specific tooling
020382Y011 adapter for valve removal tool
020382Y Valve cotters equipped with part 012
removal tool
020306Y Punch for assembling valve seal
rings
Removing the cylinder - piston assy.
- Remove the chain guide pad.
- Pull out the cylinder.
- Remove the cylinder base gasket.
- Remove the two stop rings, the wrist pin and the piston.
- Remove the piston seals.
CAUTION
ENG - 110
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MSS X9 Evolution 250