Checking The Cylinder Head - MOTO GUZZI California EV V1100 Service Station Manual

Engine
•
Lubricate the valve guide.
•
Fit the circlips.
•
Press a punch with the valve guides.
•
Use a reamer to bore the holes the
valve stems slide through so that the
inside diameter is at the prescribed val-
ue. The interference between the seat
on the head and the valve guide must
be 0.046 - 0.075 mm (0.0018 - 0.0030
in)
VALVE AND GUIDES COUPLING DATA CHART (INLET)
Specification
Valve guide inside diameter mm (in)
Valve stem diameter
Fitting clearance mm (in)
VALVE AND GUIDES COUPLING DATA CHART (OUTLET)
Specification
Valve guide inside diameter mm (in)
Valve stem diameter mm (in)
Fitting clearance mm (in)

Checking the cylinder head

Check that:
•
The planes of contact with the cover and with the cylinder are not scored or damaged so as
to compromise a perfect seal.
•
Check that the clearance between the valve guide holes and valve stanchions is within the
prescribed limits.
•
Check the status of the valve seats.
The valve seats should be reamed with a mill. The
seat inclination angle is 45° +/- 5'. After milling, it
is necessary to grind them to ensure a good cou-
pling and a perfect sealing between the ring nuts
and the valve heads.
ENG - 86
California EV V1100
Desc./Quantity
8.000 - 8.022 (0.3150 - 0.3158)
7.972 - 7.987 (0.3139 - 0.3145)
0.013 - 0.050 (0.0005 - 0.0020)
Desc./Quantity
8.000 - 8.022 (0.3150 - 0.3158)
7.965 - 7.980 (0.3136 - 0.3142)
0.025 - 0.057 (0.0010 - 0.0022)