ZHEJIANG KAYO MOTOR CO., LTD.
www.kayomoto.com
- 66 -
2
Change
fork shaft
External diameter of
fork shaft
φ
11.966~
φ
11.984
φ
11.95
cylindricity
0.01
/
3
Crankshaft
connecting
shaft
Inner diameter of
connecting rod
small end
φ
16.010~
φ
16.018
φ
16.025
Backlash at the big
end of the
connecting rod
0.10~0.3
0.5
Troubleshooting
No.
Faults
Possible causes
Remark
1
Difficulty shifting gears
Shift fork bending deformation
Bending deformation of shift fork shaft
2
skip
Shift gear pawl is worn
Bent or worn shift fork
Shift fork shaft bent
3
Crankshaft noise
The needle roller bearing oft the big end of the
connecting rod is worn
Connecting rod wear
crankshaft bearing is worn
4
Gearshift gear noise
Gearshift gear is worn
Gear shaft is worn
Crankcase Removal
1. Place the left crankcase of the engine upwards;
2. Remove the fastening bolts of the chain guard;
3. Cancel the spring of the pressing pin body and
the ejector pin;
4. Remove the fastening screws of the case body,
separate the left crankcase from the right crankcase,
and remove 2 positioning pins;
5. Separate the left crankcase body from the right
crankcase body, and remove the left case body.
Removal of crankshaft, main and auxiliary shafts
