Building a 4-stroke bicycle

[GodMan]

That was the spare sprocket that came with the 4g transmission.

That photo was for reference if anyone needed it.

I know that is the 9T sprocket, and the default one installed on the transmission is 10T.

 

[michael whiteman]

The issue you will find is there are few sprokets like this that will fit a 415 chain that comes with these kits. The only company that has a very wide selection is Stanton Inc. They actually take the common sprocket and machine the thickness down to fit the 415 chain. Don't bother looking anywhere else.

 

[GodMan]

I have messaged them. Just waiting on a response, and hopefully avoid getting the wrong item.

 

[michael whiteman]

He calleed me back, but not on the weekend. If the sprocket states 5/8"bore for a #415 chain you found the one. Just choose the number of teeth you want.

 

[Sidewinder Jerry]

This looks exactly like what you want.

Staton Inc

Sprocket 415 B 12 Tooth 5/8" ID with a 3/16" key way, two set screws. We took a # 41 sprocket and milled down the teeth to make a 415 that will use 1/2" x 3/16" chain.Best to use 415 chain (1/2" pitch x 3/16" width) These sprockets can also be used with #41 Chain (1/2" x 1/4") and #40 Chain...

www.staton-inc.com