Giant MY20, Service Manual

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5.6 MOTOR NOISE QUESTIONS
How come Giant Syncdrive Central motor makes a different noise than
some competitors?
Engineering of the hardware from the Yamaha motor has been done ac-
cording to choices made. As a consequence, the motor has a higher pitch of
motor noise compared to some competitors.
Engineering fundamentals are:
High torque, zero cadence support at 0km/h
Motor durability
Compact
Secondary:
Possibility for two chain wheels
Usage of standard bike parts (Chain wheels , derailleurs)
5.7 RANGE QUESTIONS
How come range can vary ?
The range strongly depends on several circumstances, such as (but not only):
Weather conditions such as ambient temperature and wind;
Road conditions such as elevation and road surface;
Bike conditions such as tire pressure and maintenance level;
Bike usage such as acceleration and shifting;
Rider, bike and luggage weight;
Charge and discharge cycles.
Shifting recommendations:
High speed, high gear.
Low speed, low gear.
Release power during shifting.
For better range, Giant advises to shift according to the speed. For low
speeds and setting off, low gearing is best. The higher the speed, the higher
the gear can be chosen. For smooth support and optimum range, it is best to
release pedal pressure while shifting gears.