Clutch Adjustment - Polini 911 6,2 Hp Bedienungs- Und Wartungshandbuch

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RECOMMENDED TYRE PRESSURE
FRONT
1,6 BAR – 23 PSI
WARNING! Tyre pressure varies according to the weight of
the rider, type of track, and the temperature of both the atmo-
sphere and asphalt.
7.11 THE CHAIN
The final drive chain is an extremely important component and
deserves special care and regular servicing.
DANGER. When working on the chain, take care not to jam
your fingers between the chain and sprocket.
After removing the crankcase, make sure that in the lower sec-
tion of the chain the vertical play in a point between crown and
pinion is around 10 - 15 mm (photo no. 15). Whenever this
measurement differs, adjust as follows (photo no. 16):
1
- Loosen the nut 3 on the rear wheel spindle.
- Loosen the lock nuts 2 and turn the adjusters 1 clockwise to
tighten or anti-clockwise to slacken the chain. Make sure that
the rear edges of the spindle plates are perpendicular to the
swinging arm and measure distance "A" between the swinging
arm and the plates.
- Tighten the rear spindle nut 3 (see schedule 9.1).
- Measure the chain movement again and repeat the adjustment
procedure if necessary.
- Hold the adjuster firmly with a spanner and then tighten the
lock nut "2". Whenever you check the chain tension, also check
the front and rear sprockets for wear or damage. In addition,
the chain must not have play, too much sticking or locked links.
Always lubricate the chain after washing the motorcycle. Dirty
chains can be cleaned with diesel fuel. A good quality chain
lube spray reduces chain wear and improves the efficiency of
the transmission. Chain type ASA 25-12 ISO 04C-2.
DANGER. Never fit a new chain to worn sprockets or
vice-versa. Incorrect wheel alignment not only causes rapid chain
and sprocket wear but also affects the handling and control of
ENGLISH
REAR
1,8 BAR – 26 PSI
2
A
3
the motorcycle.
DANGER. Loose, worn or badly aligned chains can break or
come off the sprockets. If this occurs the chain can jam the rear
wheel and cause accidents with serious personal injury and
damage to the motorcycle.
7.12 ENGINE CLUTCH REMOVAL
- Remove plastic chain- pass slit.
- Remove the clutch case and the clutch bell.
- Unscrew the central nut (photo no. 17) (clutch key no.
143.695.009)
- Remove the engine clutch by using the extractor (code
143.695.008).
- Check the state of wear of the bell, should it be too worn we
suggest you to replace it.
- Re-assemble the clutch (after having reconditioned it), always
by using the clutch stop. Be careful and insert the key in the
right place.
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WARNING! Absolutely tighten the nut with a torque wrench
to a TORQUE of 27 Nm 2,7 kgf m
WARNING! The clutch bell is subjected to wear in the same way
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as the clutch itself. We recommend replacing it after 9 hours of use.

7.13 CLUTCH ADJUSTMENT

For adaptation to different pilot weights and riding styles, the
clutch has been designed with the possibility for a wide range of
adjustment. The clutch can be adjusted by working on the setting
of the self-locking nuts that adjust the pre-loading of the springs,
considering that 1/6 turn of the nut (corresponding to one of its
side) either raises or lowers clutch coupling by 150r/m, thereby
also changing the total height of the springs and consequently
the total diameter of the clutch (photo no. 18).
WARNING! Although the adjustment above offers the
possibility to raise engine speed as required, the greater slip
caused by raising the number of revolutions too high for clutch
insertion can lead to clutch overheating and premature wear.
The clutch is delivered with a standard adjustment and 2.3 mm
diameter springs adjusted to a total height of 21 mm. Further
adjustment of clutch insertion revolution can be obtained by
replacing the springs with those contained in the kit (code
17
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