Gilera Fuoco 500 - Inspecting the Springs and Half-Cones; Refitting the Valves

TO AVOID SCORING THE CONTACT 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).
Inspecting the springs and half-cones
- Check that the upper and lower supporting spring
washers, the cotters and the oil seal show no sign
of abnormal wear. Replace a component when
worn.
- Measure the free length of the spring.
Characteristic
Standard length:
44.4 mm
Admissible limit after use:
42.4 mm
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
Engine Fuoco 500 i.e.
ENG - 66