Fabian
Well-Known Member
G'day all
I've stripped down my Happy Time style 69cc Chinese bicycle motor.
It has a 40mm stroke and 47mm bore.
The crank has been split to remove the big end bearing and to allow for accurate phasing of the crankshaft halves.
I've found high quality replacement big end and small end connecting rod bearings, also high quality replacement left and right side crankshaft bearings - these also happen to be the same specification as the clutch shaft bearings.
Ok, i am not knowledgeable about crankshaft balancing or the mathematical formula to create a bob weight for dialing in crank balance.
Can someone with expert knowledge in this area advise how (or give a tutorial) to complete this task.
Fabian
I've stripped down my Happy Time style 69cc Chinese bicycle motor.
It has a 40mm stroke and 47mm bore.
The crank has been split to remove the big end bearing and to allow for accurate phasing of the crankshaft halves.
I've found high quality replacement big end and small end connecting rod bearings, also high quality replacement left and right side crankshaft bearings - these also happen to be the same specification as the clutch shaft bearings.
Ok, i am not knowledgeable about crankshaft balancing or the mathematical formula to create a bob weight for dialing in crank balance.
Can someone with expert knowledge in this area advise how (or give a tutorial) to complete this task.
Fabian
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