Jump to content
Sign in to follow this  

Need help with ratio"s

Recommended Posts

Hey ive built a go kart using a 2000 Yamaha ttr-125 engine an i want to use a jack-shaft for better placement on the frame an to gain some speed. I was wondering could i use the original 13 tooth to a 28 tooth on jack-shaft than the secondary jack-shaft sprocket being a 10 going to the axle a 28 tooth? :busted::bonk::lol::busted:

Edited by Jsmith-ttr125
I dont want it in the health an fitness area

Share this post

Link to post
Share on other sites

I built a cart with a YZ 125 motor on it and that was the toughest thing to do, get the gear ratios right to get more top speed.

When I first got it done and tested it out, it had a lot of snap but no top speed at all. I tried going to the biggest front sprocket and the smallest rear sprocket I could and even tried having custom sprockets made!

After all of that and going back and forth, to get the top speed I needed I had to change the gearbox internally, I used the gearbox off a "cart" 125 motor.

Good luck and have fun, I know riding mine is a blast!

All the best,


Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this