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3) Mod. VSBl
42
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Fault
Clutch «snatching» and
- For avoiding defects to main bearing clutch side ( lubri
defective main bea
rings, clutch side
Defective front suspen
- If the front suspension presents end of run bottoming, sub
sion
- When it is necessary to assemble a new piston and cylinder
Cases of excessive pis
ton noise
Operations to carry out
cated by the oil in gear box) and snatching of the clutch,
it is necessary ensure that the oil in the gear box does
not fall below the prescribed level ( see booklet Operation
and Maintenance).
In the case of engine overhauls of a complete oil change,
introduce about 250 cc. of new oil.
On vehicles with an engine number successive to VSB 1 M -
009501, the oil filler hole is situated so that when the
vehicle in a vertical position, the oil comes up to the level
of said hole; on vehicles prior to the above mentioned
number the oil filler hole is situated lower and 180 cc.
is suffkient for attaining the required level in the gear case.
Before reassembling carefully clean the plug on the oil
discharge hole, which is of the « magnetic » type.
stitute the existing buffers if they are not of the cylindrical
type; where necessary also substitute the damper.
From the Vespa G. S. VSB 1 T - 008019 a damper has
been introduced with superior braking qualities on the
compression stroke.
for eliminating excessive noise, check that the assembly
play between the two components is of 0.12 - 0.125 mm
N. B. - For dismantling the muffler connecting sleeve from
the pre - existing cylinder, use the apposite wrench 0028182
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