MOTO GUZZI V10 CENTAURO Werkstatt-Handbuch Seite 94

INSPECTION OF VALVE SPRINGS - Fig. 11-76
Check that the springs are not deformed and have not lost their load:
External spring
■ free, has a length of 43.5;
■ with closed valve, has a length of 36 mm and must give a load of 16.42÷18.14 kg;
■ with open valve, has a length of 26.5 mm and must give a load of 38.02÷40.37;
■ compressed, has a length of 22.5 mm.
Internal spring
■ free, has a length of 37 mm;
■ with closed valve, has a length of 32 mm and must give a load of 9.41÷10.39;
■ with open valve, has a length of 22.5 mm and must give a load of 27.86÷29.59;
■ compressed, has a length of 20.3 mm.
If the springs do not satisfy the above specifications they must be replaced.
Kg 16,42÷8,14
Kg 38,02÷40,37
Cylinder wear check - Fig. 11-77
The measurement of the cylinder diameter must be made at three heights, turning the feeler gauge by 90°. It is
also important to check that the cylinders and the pistons are of the same selection class (A, B, C).
Grading cylinder diameter
GRADE A
89,967÷89,973 89,973÷89,979 89,979÷89,985
92
43,5 mm
36 mm
26,5 mm
Ø 90.000÷90.018
1st Measurement
2nd Measurement
3rd Measurement
GRADE B GRADE C
Kg 9,41÷10,39
Kg 27,86÷29,59
89.967÷89.985
control
measurement
for selection
Grading pistons diameter
GRADE A GRADE B
89,967÷89,973 89,973÷89,979 89,979÷89,985
37 mm
32 mm
22,5 mm
11-76
11-77
GRADE C