4-1
ZHEJIANG KAYO MOTOR CO., LTD.
Item
Standard
Limitation
Connecting rod tip clearance
0.100-0.350mm
0.550mm
Radial clearance of connecting rod
tip
0.006-0.016mm
0.050mm
Crankshaft vibration
-
0.100mm
Torque
Crankcase bolt 1.5-2.0 kfg-m
Cylinder/cylinder head double-head bolt 0.7-1.0 kgf-m
Engine drain bolt 3.5-4.5 kgf-m
Tensioner bolt of cam chain 0.8-1.2 kgf-m
Specific tool
Inner plug-in bearing; extractor; outer extractor; bearing press machine; oil press machine.
Troubleshooting
Abnormal noise: large bearing clearance; large clearance of crankshaft pin bearing; piston
pin or piston worn; large balance shaft clearance.
Crankcase disassembly
Remove 2 bolts from right side of crankcase, then take 5 balance shaft cover bolts from
left crankcase, last remove 3 pull rod bolts.
Disassemble right crankcase and separate left and right crankcases. Remove cam chain.