Structure And Working Principle Of Front And Rear Dampers; Front Damper; Rear Damper; Section 9 Damper - ZONGSHEN ZS125-80 Service Manual

The front damper is an elastic connecting member between the front wheel and the vehicle body.
The rear damper mainly receives the axial force from the rear wheel. They both support the weight of the
vehicle body. In the process of driving the motorcycle, dampers effectively and quickly decay the impact
and shock from wheels to occupants and buffer the stress on various parts of the motorcycle to extend the
service life and improve the riding comfort, operability and stability.

1. Structure and Working Principle of Front and Rear Dampers

[1]Front damper

The front damper is a combined type with a hydraulic spring. The front damper is mainly composed of
a damper spring, a seal ring, a dust cover, a piston ring, a damper column, a piston rod, a buffer spring,
a one-way valve spring seat, a one-way valve spring, a one-way valve, one-way valve seat, a damper
cylinder, piston rod seat and other components.
When the front wheel is subjected to the impact and vibration from the road surface, the damper
cylinder ascends, and the damping oil in the damper flows up through the one-way valve and the hole in
the piston rod; at this time, the damping force is not big. When the damper cylinder continues to ascend,
the gap between the one-way valve seat and the cone of the piston rod seat is getting smaller and smaller,
and the damping force is increased to prevent the front damper cylinder from colliding with the front
damper. When the damper cylinder descends due to the restoring force of the front damper spring, the
damping oil can only flow out of the small hole in the piston rod due to the closed one-way valve, to form
a larger damping force, effectively attenuating the vibration of the front damper spring.

[2.]Rear damper

The rear damper is also a combined type with a hydraulic spring. It consists mainly of an upper joint,
rubber jacket, a bush, a rear damper spring, a rear damper rod, a piston, a buffer, and a lower joint, etc.
The rear damper is mainly stressed by the rear wheel axial force. When the rear wheel is subjected to
the impact and vibration from the road surface, the rear damper compresses and stretches, the hydraulic
oil in the buffer is forced to flow through the damping hole, effectively attenuating the vibration of rear
damper.
2. Demolition and Maintenance of Front Damper
[1] Check the front damper for its effective stroke
and operating performance and for any leakage.
Caution
The front damper, subject to an abnormal
s i t u a t i o n, s h o u l d b e t i m e l y i n s p e c t e d a n d
maintained, so as to ensure traffic safety.
[2] Remove the fixing bolts on the front damper
and take out the front damper.
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Section 9 Damper

Check the front damper
Remove the bolts
on front damper