I am currently making a motorized Northern Star ATB with a jackshaft shift kit.
It had a one piece crank which I am converting to a three piece unit.
What has me totally baffled is that the crank on the chain wheel side is half an inch further out than the other crank????
The crankshaft is offset like all that I've seen are. I have the longer side on the chain side - I think this is how they always go... I even pulled apart another bike to check!
The frame appears symmetrical where the crank goes through.
I am using a conversion kit from SBP's.
My other motorized one piece crank bike did not have this issue.
I use 125mm crankshafts to keep the stock width.
I tried reversing the crankshaft, but that puts the chainwheels too close to the frame.
What could I have done wrong?
It had a one piece crank which I am converting to a three piece unit.
What has me totally baffled is that the crank on the chain wheel side is half an inch further out than the other crank????
The crankshaft is offset like all that I've seen are. I have the longer side on the chain side - I think this is how they always go... I even pulled apart another bike to check!
The frame appears symmetrical where the crank goes through.
I am using a conversion kit from SBP's.
My other motorized one piece crank bike did not have this issue.
I use 125mm crankshafts to keep the stock width.
I tried reversing the crankshaft, but that puts the chainwheels too close to the frame.
What could I have done wrong?