weld flywheel to crank?

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it will all depnd on that the difference is in betwwen the metals say if the crank is spun steel and the irk rotor is cast iron and if u r goin to do it be very care full because it will go out of balance
 
recutting the slide would be better? I have a crank out of a 140 lifan if interested? got a whole 140 if your interested ;)
 

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