Rear sprocket options

bravofire84 · #1 05-13-2009, 06:34 PM

could i use a 51 tooth sproket off a mountian bike to work as a rear chain sproket.

**Norman** · #2 05-13-2009, 08:25 PM

If the chain on the china engine fits your sprocket that you want to use and you have a way and means of drilling it to fit the china rear sprocket set up/ mounting rags and metal backing plates, then yes it will work. You will be able to climb some steep hills with that set up, not much for speed though.
Norman

**Dave31** · #3 05-13-2009, 09:01 PM

I took off the crank off an old Mountain bike and pulled the sprockets and used them for the rear sprocket.

**Norman** · #4 05-13-2009, 11:14 PM

There you go! Fairracing is on the ball looks like he's the man as he has done it.
Thanks Fairracing for the pictures!
Norman

**Dave31** · #5 05-14-2009, 01:19 AM

Yeah I did not have any $$$ for a sprocket so I just used what I had. I am using a #41 chain and the rag joint set-up to attach it to the wheel.

sharkcruiser · #6 05-14-2009, 03:22 PM

Hey Fairracing,

How well does the "rag joint" work with only five bolts in there? I have the chain rings to do the same exact thing and am in the middle of making metal plates for the outside rag right now. If yours works well with just the 5 then I'll do that then.

**Dave31** · #7 05-14-2009, 03:34 PM

Quote:

Originally Posted by sharkcruiser

Hey Fairracing,

How well does the "rag joint" work with only five bolts in there? I have the chain rings to do the same exact thing and am in the middle of making metal plates for the outside rag right now. If yours works well with just the 5 then I'll do that then.

It worked just fine, just use some fender washers on the back plates.

sharkcruiser · #8 05-14-2009, 04:18 PM

Fender washers in lou of the back plate or in addition to the back plates? Would you mind posting a pic if you have one? Thanks in advance.

sharkcruiser · #9 05-14-2009, 05:09 PM

I think I understand now. Use the fender washers on top of the plates to apply pressure to the areas where the bolts were left out. Sorry about that.

**Dave31** · #10 05-14-2009, 05:21 PM

Quote:

Originally Posted by sharkcruiser

I think I understand now. Use the fender washers on top of the plates to apply pressure to the areas where the bolts were left out. Sorry about that.

Yes, correct... help spread the load.