What kind of sprocket does this

[Shawn drifts]

The kind how it is like a ratchet, where is spins fre one way and locks the other way? it just needs to grab foward and coast when the load is off/going backward. The one on most bmx/mountain bikes

I need one.... Any size is fine.

 

[mckutzy]

The bicycle chain isnt the same as the clutch, so you might need a jackshaft.
But more importantly what is this for?

 

[Jcotz]

I'm not sure I'm understanding what you are saying, but won't the engine's shaft not be turning in reverse? So what is the point of the one way bearing? I'm not sure I understand.

Edit: Oh, I see what you are trying to do. Couldn't you molest an old bike for one? Or would that not be strong enough?

Double edit: Maybe this http://www.allelectronics.com/make-a-store/item/CH-10/One-Way_Roller_Bearing_And_Sprocket/1.html

 

[r97]

Could you please explain further what your trying to accomplish here?

The kind of bearing your looking for is here:
http://www.mcmaster.com/#locking-bearings/=h0bbsg

One thing I will point out is that a one way bearing will engage when reversed.

 

[Shawn drifts]

nvm, figured it out.
went to bike shop, its called a freewheel sprocket.... its teeth were kinda lanky but it should do..... just gotta make sure chain is TIGHT and everything is PERFECTLY aligned.

 

[Jcotz]

Yeah, just make sure you don't hit any bumps . Honestly though, this build is going to be great.

 

[r97]

I'm still curious to see what exactly you plan to accomplish with this. Be careful with the bike free wheel, it's probably not made for the types of speed your going to be using it at.

 

[ML-TOYS]

For what kind of power and speeds

 

[Shawn drifts]

See build thread for more info!

http://www.diygokarts.com/vb/showthread.php?t=15952

 

[sexyvicta]

if you used a bmx freewheel it should accept the bigger sized chain and they seem to work ok when the chain is not perfectly aligned but they tend to fail and end up freewheeling in both directions when you try to put too much power through them:arf: