Gilera 633721 Workshop Manual page 151

Nexus 500 euro 3
Refitting the valves
- Place the valve spring support washers on the
head.
- Alternately insert the 4 oil guards using the spe-
cial tool.
- Lubricate the oil guards and the valve guides.
Specific tooling
020306Y Punch for assembling valve seal
rings
- Fit the valves, the springs and the caps. Using
the appropriate tool with adapter, compress the
springs and insert the cotters in their seats.
Specific tooling
020382Y Valve cotters equipped with part 012
removal tool
020382Y012 bush (valve removing tool)
N.B.
DO NOT CHANGE THE VALVE FITTING POSITION. FIT THE VALVE SPRINGS WITH THE REF-
ERENCE COLOUR ON COTTER SIDE (TURNS WITH GREATER PITCH).
Inspecting the cam shaft
- Check that the camshaft bearings exhibit no scores or abnormal wear.
- Using a micrometer, measure the camshaft bearings.
Specification
Bearing A Ø:
Bearing B diameter:
Specification
Bearing A Ø:
Bearing B diameter:
STANDARD DIAMETER
MINIMUM ADMISSIBLE DIAMETER
Desc./Quantity
42 - 0.060 -0.085 mm
20 - 0.020 -0.041 mm
Desc./Quantity
41.910 mm
19.940 mm
Engine
ENG - 151