Gilera 2008 MSS Nexus User Manual page 24

Characteristics
Specification
Standard clearance:
Admissible limit:
Specification
Standard clearance:
Admissible limit:
- Check that there are no signs of wear on the surface of contact with the articulated register terminal.
- If the checks above give no failures, you can use
the same valves. To obtain better sealing perform-
ance, grind the valve seats. Grind the valves gently
with a fine-grained lapping compound. During the
grinding, keep the cylinder head with the valve ax-
es in a horizontal position. This will prevent the
lapping compound residues from penetrating be-
tween the valve stem and the guide (see figure).
CAUTION
TO AVOID SCORING THE FAYING SURFACE, DO NOT KEEP ROTATING THE VALVE WHEN NO
LAPPING COMPOUND IS LEFT. CAREFULLY WASH THE CYLINDER HEAD AND THE VALVES
WITH A SUITABLE PRODUCT FOR THE TYPE OF LAPPING COMPOUND BEING USED.
CAUTION
DO NOT REVERSE THE FITTING POSITIONS OF THE VALVES (RIGHT - LEFT).
- Check that the camshaft bearings exhibit no scores or abnormal wear.
- Using a micrometer, measure the camshaft bearings.
Specification
Cam shaft check: Standard diameter
Cam shaft check: Standard diameter
Specification
Cam shaft check: Minimum admissible diameter
CHAR - 24
MSS Nexus 300 i.e. E3 ( 2008)
INLET
OUTLET
S
TANDARD DIAMETER
M
INIMUM DIAMETER PERMITTED
Desc./Quantity
0.013 - 0.04 mm
0.08 mm
Desc./Quantity
0.025 ÷ 0.052 mm
0.09 mm
Desc./Quantity
Bearing A Ø: 36.95 ÷ 36.975 mm
Bearing B diameter: 19.959 ÷ 19.98 mm
Desc./Quantity
Bearing A Ø: 36.94 mm