8 tooth?

F

f250cobra

Member
Is there an 8 tooth drive sprocket available for the Chinese 2 strokes? They come with a 10 tooth but an 8 tooth would suit me for the jack shaft I am making. Does anyone know the shaft size the 10 tooth goes on? is it a 5/8 id sprocket? Any help would be killer. Thanks.
 
None I know of and the sprocket is pretty much unique for these motors. I think the case blocks anything bigger and the sprocket shaft makes it so nothing smaller can be fitted.

If I'm wrong I'd like a 9 tooth, please :)
 
8 tooth would get obliterated as a drive gear, hard on the chain too. 9 tooth would work a bit better and there was a hint of one in the past. Pop yours off and see how it's kind of unique to the engine kit.
 
Hey All,

FWIW, we can make custom sized chain rings for the shift kit to help you get the gearing you want / need....

Finding different sized sprockets for the engine / other jack shaft sprockets could be hard to find.

Andrew
 
Andyinchville1 said:
Hey All,

FWIW, we can make custom sized chain rings for the shift kit to help you get the gearing you want / need....

Finding different sized sprockets for the engine / other jack shaft sprockets could be hard to find.

Andrew
Click to expand...
Thats great Andy
I need some custom chain rings.
but are you going to answer the phone and return calls? LOL

Last time I called you hung up and never returned my voice mail???
I needed a + -62 tooth rear sprocket in a hurry.
Are you really back to making sprockets? You are a hard man to get a hold of. lol
 
Hate to be the doubter, but I wonder if a 415 chain would wrap that tight around that small a sprock- doesn't seem that mechanically sound and would probably use a lot of energy to bend. If the gear is too big, You may be better going larger on the back-

of course that increases clearance problems and makes a tensioner more necessary
 
Andyinchville1 said:
Hey All,

FWIW, we can make custom sized chain rings for the shift kit to help you get the gearing you want / need....

Finding different sized sprockets for the engine / other jack shaft sprockets could be hard to find.

Andrew
Click to expand...

Hey Andy, can you send me a PM on a price for a 30 tooth #41 sprocket 5/8 id with a 3/16 key-way? This would negate the 8 tooth and still give me the 3.0:1 gearing ratio I am looking for.
 
f250cobra said:
Hey Andy, can you send me a PM on a price for a 30 tooth #41 sprocket 5/8 id with a 3/16 key-way? This would negate the 8 tooth and still give me the 3.0:1 gearing ratio I am looking for.
Click to expand...
That is a stock item from McMaster-Carr
Sells for about $29 in my outdated catalog.
 
Boygofast on ebay is listing a 41 tooth rear sprocket from newer kits that is fairly lightweight and countersunk

Opps- don't see it there now- but it was.
 
Hi,

1) Sorry about not calling back...I guess I must have forgotten...Price for 62T sprocket would be $54.50 plus $5 s/h to the USA

2) PM sent.

Thanks!

Andrew
 
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