Yamaha PW SYSTEM Manual page 9

Bolts and screws
When riding the bicycle, vibrations occur, which can loosen bolts and screws. Therefore, the bicy-
cle should be regularly checked and loose parts tightened.
Do not use excessive torques. The tightening torque must be adapted to the dimension of the
screw assembly. If it is too tight, there is a risk that the screw will come off or the thread will be
damaged.
The following tightening torques are indicative for standard bicycles, but can vary greatly depen-
ding on the material the frame and component are made of:
Crankshaft pin
Lock nut on steering bearing
Front wheel hub nuts
Rear wheel hub nuts
Expander bolt in stem
Seat post
Saddle
If in doubt, you should leave the work to your bicycle dealer, as incorrect tightening torque can
cause damage to the frame and components and, in the worst case, lead to accidents.
Cables
All cables should be kept well lubricated. Regularly check the cables for breaks or wear on the
wire, so that bursting of the cable is prevented.
Important: It is important for safety to have the bike dealer blow all cables clean of condensation
and lubricate them before the winter period with a silicone-based grease. This minimizes the risk of
the cables freezing.
35 - 55 Nm
25-35 Nm
20-30 Nm
30-45Nm
15 Nm
7 Nm
20 Nm
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