Help with crank shaft

[Andrew1234]

I have a js50 crank shaft from a 50cc motorized bike kit and was wondering if I could balance it and put it in a ordinary 80cc engine

 

[GW's Motorized]

I don't think so. Its probably thinner, a differnt stroke, and a different rod length

 

[Sidewinder Jerry]

I have a js50 crank shaft from a 50cc motorized bike kit and was wondering if I could balance it and put it in a ordinary 80cc engine

Only way to be sure is do a side by side comparison.

 

[Chainlube]

I have a js50 crank shaft from a 50cc motorized bike kit and was wondering if I could balance it and put it in a ordinary 80cc engine

Lots of cranks have the same stroke, the only difference between the two engines is the bore. So, you need the stroke length to determine if it has a low or high hole piston. You will need the piston with rings and clips to balance.

 

[Andrew1234]

Lots of cranks have the same stroke, the only difference between the two engines is the bore. So, you need the stroke length to determine if it has a low or high hole piston. You will need the piston with rings and clips to balance.

it needs a low hole piston

 

[Chainlube]

it needs a low hole piston

If you have the crank in your hand, post a pic.

 

[Andrew1234]

If you have the crank in your hand, post a pic.

i will when i get back home this afternoon

 

[Andrew1234]

If you have the crank in your hand, post a pic.

 

[Chainlube]

Yea, it certainly looks like a 66c type crank.

 

[Nickt919]

JS50 rod = 66/80cc short rod low hole piston