Section 4 Rear Transmission Device - ZONGSHEN ZS250GY-3 Service Manual

Because the export torque of engine is small and its rev is fast,it only can enhance the torque of
engine to ensure the good working condition of motorcycle by 3-time deceleration.The first time is through
the drive and driven gear of cluth.The second time is through the drive and driven bearing of derailleur.The
third time is through the drive and driven gear of rear transmission device,so that the export power and rev
of engine can economically and properly be used.
1 The Structure and Working Principle of Rear Transmission Device
20

Section 4 Rear Transmission Device

gearshift axle
rear cover of
left crankcase
T h e r e a r t r a n s m i s s i o n d e v i c e o f t h i s
motorcycle adopts chain.It mainly consists of drive
gear,driven gear,drive chain,chain tie-in,drive chain
box,chain adjuster and rubber dead block.
First,it expor ts power through the end of
countershaft of engine derailleur(power-exporting
bearing),then transfers the power to driven chain
through drive chain and makes 3-time deceleration.
The driven chain is fastened on the cushion body
by bolts.The cushion body connects with rear hub
through rubber dead block.So when changing the
speed during running,power is transferred flexibly
through rubber cushion,so it avoids the abrasion
of parts and enhances the comfort and stability of
motorcycle.
2 D i s a s s e m b l y a n d M a i n t e n a n c e o f Re a r
Transmission Device
[1]Dismantle the fixed bolt of gearshift pedal and
remove the gearshift pedal.
[2]Dismantle bolts of lef t rear cover of lef t
crankcaseand remove lef t rear cover of lef t
crankcase.