15
time, this may cause damage to the wheels and spokes that will not be covered under our
Warranty.
3.9
Chain and drive wheel removal
3.12.1 To completely remove the rear wheel, it is necessary to disconnect the main motor cable
connecting the motor to the bicycle electrical system. This operation is best achieved by
turning the bicycle upside down.
3.12.2 Locate the motor cable where it emerges from the centre of the wheel axle on the left-hand
side of the bicycle, slide back the top hat protector to locate wheel nut.
3.12.3 Trace the route of the motor cable along the rear stays and locate the quick release motor
cable connector, it is located in a recess in the chain stay for protection against weather and
physical damage. Flick out the connector with an electrical screw driver and disconnect the
two halves of the connector, taking care not to strain the cables, then unclip the motor cable
from the frame. Note the alignment marks on the two halves of the connector.
3.12.5 Loosen the two large motor axle nuts and remove the nut from the right-hand side, taking
care to note the position of any tab washers fitted. Unscrew the left-hand nut as far as is
possible towards the cable exit from the motor axle, being careful not to damage the cable.
3.12.6 Lift the wheel from the frame dropouts, being careful not to snag or strain the motor cable.
3.12.7 Installation is the reverse of the above. Take care to locate the tab washers correctly in the
drop out slots and tighten the axle nuts to the torque specified in the manual. Reconnect the
two halves of the quick release connectors, taking care to ensure the pins and alignment
arrows align correctly. Re-clip the cable into the frame, ensuring that the cable cannot rub
against the tyre and that the cable exits in a downwards direction from the axle to avoid
water ingress into the motor. Refit the rubber top hat cover.
Because the bicycle has a rear derailleur, the chain will be automatically adjusted.
3.10
Derailleur and gear change
3.13.1 Full details on how to adjust and maintain your derailleur can be found in the Shimano
manual available on the Shimano web site.
If difficulty is experienced with changing gear after initial operation of the bicycle, it is likely
that some cable stretch will have occurred in the gear change cable. To compensate turn the
knurled adjuster shown in the centre left hand side of the image below by pulling it away
from the outer cable stop in the direction of the cable towards the rear of the bicycle and
turning it ½ turn anticlockwise when viewed from the rear. This will compensate for the
cable stretch. If necessary, repeat the operation again until smooth gear selection is
obtained or return your bicycle to your Wisper dealer for further adjustment.
3.13.2 To change gear, use the 7-speed rapid fire gear shifter located on the right side of the
handlebar. The two levers located underneath the shifter can be pulled and pushed to
select the gears over the range 1 to 8.
