6.  Install 4th speed gear needle bearing washer. 

 

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7.  Install 4th speed gear needle bearing. 

 

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8.  Install the 4th speed gear. 

Notes : Input shaft 4th speed gear axial clearance is 
0,1～0,55mm(3,937～21,654 in×10

-3

) 

 

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9.  Install 4th speed gear retaining ring. 

Notes : limiting ball direction of retaining ring is 
consist with retaining ring 

！

 

 

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10.  Install 4th speed gear snap ring. 

 

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11.  Install 5th speed gear needle bearing gasket. 

 

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12.  Install 5th speed gear needle bearing. 

13.  Install the 5th speed. 

Notes : Axial clearance for input shaft 5th speed gear 
is 0,1～0,50mm(3,937～19,685 in×10

-3

) 

14.  Install 5th speed synchronizer 

Notes: synchronizer has directional, One face of 
boss face to rear-end of transmission. 

 

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15.  Install Input shaft rear support bearing . 

Notes : The bearing has directional , one face of oil 
seal face to rear-edn of transmission input shaft 4th 
speed , 5th speed gear radial clearance 

0,058mm( 2,146 in×

≦

≦

10

-3

) 

16.  Install Input shaft assembly. 

 

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17. Install fork shaft.refer to“3.4.8.6 fork shaft 
replacement ” 

18.  Install shift control mechanism assembly; refer 
to“3.4.8.4shift control mechanism assembly 
replacement”. 

19. 

Install transmission assembly, refer 

to“3.4.8.3transmission assembly replacement” . 

 

 

 

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3.4.8.8 Disassembly and assembly of main shaft 

Dismantle procedure 

一档齿轮   二档齿轮

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1.  Refer to 3.4.8.3 "Replacement of transmission 

assembly" to dismantle the transmission 
assembly. 

2.  Dismantle shift control mechanism assembly, 

refer to“3.4.8.4shift control mechanism assembly 
replacement” . 

3.  Dismantle fork shaft.Refer to“3.4.8.6fork shaft 

replacement ” 

4. Dismantle main shaft assembly in the 

transmission. 

Notes : Gear axial clearance of main shaft 1st speed 
and 2nd speed : 

1 nd speed :0.1～0.35mm(3.937～13.780 in×10

-3

) 

2 nd speed :0.1～0.35mm(3.937～13.780 in×10

-3

) 

Gear radial runout of main shaft 1st speed and 2nd 
speed : 

0.056mm (2.205 in×

≦

≦

10

-3

) 

5.  Pull out main shaft rear bearing shaft by special 

tool bearing puller. 

 

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6.  Take out 5th speed gear snap spring by snap 

spring pillar. 

 

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