Broncco Minibike Sprocket on Sprocket Mod, will it work

[@robostyle9773]

You did a great job getting everything centered- could you not just weld the 2 sprockets together?

[@woodysgarage469]

I didn't want to trash the original, plus I wasn't sure it was true.

[@robostyle9773]

To figure out the ratio, just count the teeth bud

[@woodysgarage469]

So what am I looking for Robo? 14 on the clutch, 38 jackshaft in, 12 jackshaft out to 62 rear sprocket.

[@jeep2003]

thats 14 to 1. with that tire size i think you would want like 10 :1 so maybe a 25t instead of the 38 but you might as well try it as it is first

[@woodysgarage469]

@@jeep2003 I would think Tire size and Sprocket size would be a factor. A #35 60 tooth sprocket is far smaller than a #41 60 tooth. I have been using this jackshaft calculator but it takes neither into account. I'd rather low end torque than high speed. Trial and error is the name of the game I think. Thanks

[@woodysgarage469]

The calculator: www.bmikarts.com/Go-Kart-Gear-Ratio-Calculator-Jackshaft-Setup

[@robostyle9773]

@@woodysgarage469 i posted the calculator in my original reply