Removing The Valves - MOTO GUZZI Stelvio 1200 NTX 2011 Service Station Manual

Stelvio 1200 NTX MY11

Removing the valves

•
Remove the head.
•
Place the special tool on the upper cap
and at the centre of the head of the
valve to be removed.
Specific tooling
10.90.72.00 Tool for valve removal and refitting
AP9100838 Tool for valve pressure plate
•
Tighten the tool screw until fitted, and
then hit the tool head (where the upper
cap works) with a mallet so that the two
cotters (1) get detached from the upper
cap (2).
•
Once the two cotters (1) are detached,
screw these cotters until they can be
slid off the valve seats; unscrew the
tool and remove it from the head.
•
Slide off the upper cap (2).
•
Remove the spring (3).
•
Remove the lower cap (5) and the
valve guide oil seal (4), if necessary.
•
Remove the valve (6) from inside the
head.
Checking the valve guides
Use a punch to extract the valve guides from the heads.
The valve guides should be replaced only if the clearance between them and the stem cannot be elim-
inated by simply replacing the valves.
To refit the valve guides on the head, follow this procedure:
•
Heat the head in an oven at approximately 60°C (140°F).
•
Lubricate the valve guide.
•
Fit the circlips.
•
Press a punch with the valve guides.
Engine
ENG - 199