Started building my motorized bike today but ran into a problem

[Rusty_Nail]

Hey everyone, as I am new to this hobby i have run into a problem. Its on a cranbrook and when i try to turn the pedals the back wheel acts like it cant rotate. The drive chain is not connected to the motor yet nor is the clutch installed. Like its locked up or something. What can I do to fix this? Is it a common problem on Cranbrooks?

 

[MEASURE TWICE]

I don't know if you have coaster brakes, but if so, then there has to be the bar from the hub clamped to one side of the back stay. If missing replace it. With it missing it acts like back pedal as in coaster braking.

 

[Venice Motor Bikes]

I'm assuming you have a coaster brake?? (pedal back brake)

You need to trim the edge of the dust cap off so it doesn't contact the center hole of the new sprocket.

Search this area for 'coaster brake arm' instructions & 'dust cap'

 

[Rusty_Nail]

Ok guys thanks again for the advice. I am getting a CBC sprocket. I noticed the hole in the cnc sprocket is a bigger diameter. Would it be possible to get it around the coaster brake arm without removing it? I’ve heard on the cranbrooks that once you remove the coaster brake arm you have to readjust the hub but I’m trying to avoid having to do that. I hear it’s tricky.