What kind of gear and shifter for it

[dsmeltaway]

First of all this may be in the wrong area but it's worth a try. I want to do a setup where I have a centrifugal clutch connected to a jack stand with a three speed sprocket to the actual live axle. I would have a derailleur on the three speed sprocket. I just have no idea what to use for a "transmission". Help?

 

[fowler]

do u mean u have three sprockets next to each other like a bike or do u have a speical gear box?

a bike setup wont work on karts
the chain we use wont flex enough and bike chain will snap

 

[mckutzy]

I reckon this is as close to DIY as you can come by. There is a few discussions about this here on this forum.
http://www.thepixelpump.com/widdershins/how-to-2speed-transmission.php

 

[dsmeltaway]

ya a bike setup and a derailer as the actual shifter.

 

[dsmeltaway]

the three sprockets i have are so consolidated that they're less than an inch apart all together.

 

[fowler]

still doesnt mean the chain will flex

go find a peice of chain and lay it on the floor and try to bend it

 

[dsmeltaway]

what would you suggest then? i dont wanna spend a lot of cash on a gearbox, is there aryway i could do it otherwise?

 

[Doc Sprocket]

Honestly, unless you score huge on a low-buck junkyard find and have the skills to make it work, forget it. Options are pretty limited, and most of them are not cheap.

 

[dsmeltaway]

haha skills and materials arent the problem, i just want a second opinion whether or not itd work?

 

[Doc Sprocket]

What, bike parts? then no, they won't.

 

[dsmeltaway]

similar to them. see i want to run a chain from a centrifugal clutch on the crank to a jackshaft. on that jackshaft i want two or three differnet sized sprockets with a derailer on the apparatus to act as a shifter LIKE on a bike, and run that one chain to the actual live axle with one set sized sprocket.

 

[Russ2251]

In the the end, it would be a shifting nightmare.
A CVT would be cheaper and far more durable.

 

[fowler]

ride your bike up a steep hill and try to change gear

now imageing that with a chain the wont flex with 4x more force and the whole system spinning at 2000rpm

 

[r_chez_08]

The only design I could see that would be similar would be multiple sprockets on the js and axle, that have a spring belt tensioner so you could stop and change the gearing by releasing the tensioner.
You could also use or make a multiple speed belt tensioner.