Section 6 Rear Driveline - ZONGSHEN ZS125-86 Service Manual

Due to smaller torque and faster speed initially output by the motorcycle engine, it must go through
three-level slowdowns so as to improve the engine torque to ensure the proper driving of the motorcycle.
For Level 1 slowdown, it goes through the driving gear and driven gear of the clutch; for Level 2 slowdown,
it goes through the main shaft and auxiliary shaft of the gearshift; for Level 3 slowdown, it goes through
the driving gear and driven gear of the rear transmission device. Such an arrangement contributes to more
economical and reasonable use of the power and speed output by the engine.
1. Structure and Working Principles of Rear Driveline
The motorcycle rear transmission device is driven through the chain. It mainly consists of the driving
gear, driven gear, transmission chain, chain connector, transmission chain set, chain adjuster, buffer block
and other components.
The power is firstly output through the driving sprocket at the end of engine transmission sub-shaft (power
output shaft), and then transmitted through the transmission chain to the driven sprocket, and then goes
2. Demolition and Maintenance of Rear Driveline
Shift shaft
Rear case cover of
LHS crankcase

Section 6 Rear Driveline

through three-level slowdowns. Bolts are applied to
fix the driven sprocket on the buffer body, which is
joined by a rubber buffer block with the rear wheel
hub. Therefore, when the gear is shifted in driving,
the power buffered by the rubber piece is softly
transmitted, avoiding the abrasion between parts
while improving the motorcycle driving comfort and
stability.
[1] Remove the fixing bolts on shift pedal and take
down the shift pedal.
[2] Remove the bolts on the LHS rear case cover of
the LHS crankcase and remove the LHS rear case
cover of the LHS crankcase.
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