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3.5.4 The optimum range is achieved when the rider pedal effort is maximized, and an ideal
situation is for the rider to aim to match the power being provided by the bike on an equal
basis.
3.5.5 The battery capacity indicator is provided to give an approximation of battery capacity
remaining. Each bar on the LCD approximates to a ¼ of the capacity. However, this indicator
relies on sensing battery voltage that will rise and fall depending on the amount of power
being demanded at any given time, the meter should only be used for indication purposes.
3.5.6 The battery capacity indicator, built into the top of the battery provides a similar
indication and operates on the same principle.
3.5.7 Under heavy power draw (full throttle or high levels of assist) the battery voltage will
temporarily dip resulting in the capacity meter showing a lower level of charge. When the
heavy power usage is reduced, the capacity meter will rise again as the battery naturally
recovers its voltage.
3.5.8 During the discharge period of the battery, the voltage will drop from an initial voltage of
nearly 42 Volts to a minimum of 31.5 Volts. The bulk of the discharge period will be in the
range of 38 to 36 Volts which provides the optimum performance for the bicycle. Due to this
wide range in voltage, the performance of the bike will vary depending on the state of
charge of the battery. To achieve the best possible performance, it is better to start a
journey with a fully charged battery and to recharge it at the end of each journey.
3.5
Brakes
3.6.1 Disc brakes are fitted to the front and rear wheels of the bicycle. Disc brakes offer several
advantages over traditional rim brakes, including better braking in wet, muddy or other
adverse conditions and less braking power fade over extended downhill braking.
3.6.2 Details of how to adjust and maintain your brakes are as follows:
3.6.3 Regularly inspect the brake pads for wear. If they have reached the wear limit of 1mm,
replace them immediately.
3.6.4
To replace the brake pads, unless you are a competent bicycle mechanic always take your
bike to your Wisper dealer.
Front brake: Remove the caliper from the fork leg, complete
with the mount adapter by removing the two 6mm Allen caliper fixing screws. Rear brake:
Remove the caliper by removing the two 6mm Allen caliper fixing screws on the bike frame.
The pads can then be removed by unscrewing and removing the pad retaining screw (which
passes through the tabs of the brake pads) using a 3mm Allen wrench. Then lift the pads
complete with the spring out of the rotor slot in the caliper body.
Warning!
Do not loosen any other screws on the caliper.
3.6.5 To refit the pads, hold the pads complete with spring as an assembly and insert into the
caliper slot with the metal backing towards the pistons. Refit the pad retaining screw
ensuring it passes through the holes in the pad tabs and through the hole in the spring and
tighten to 3–5 N.m. Refit the caliper loosely using the two Allen screws, apply the brake
lever and tighten securely to 6 to 8 Nm whilst continuing to apply the brake lever. (N.B. use
of a thread locking compound is recommended on the caliper fixing screws).
