Getting more speed from jackshaft

[The.MiniTard]

I have a predator powered Baja Hawg Ty. The acceleration is great, but I need a bit more speed without hopping up the engine.

I understand how the jackshaft works, I just want to know if anyone has had any experience with changing the jackshaft in sprocket with a smaller toothed gear? if so, what were your experiences in doing so?

I have a buddy who's telling me to ditch the jackshaft altogether but I have no interest in that because i like to go off road.

 

[noseoil]

You can go with a TAV type of setup to gain top speed & not miss out on bottom end at all (only about $70). You can change the jackshaft sprockets to change final drive, but it won't accelerate as well & is harder on the clutch. I've done both & a TAV is a pretty good compromise between top speed & acceleration for a bike.

When you start playing with the primary sprocket, you need to watch the chain length. The secondary drive sprocket swap is easier to adjust for chain length.

 

[MJL]

The outboard jackshaft sprocket (the one connected to the clutch) has a harder to find recessed hub. The inboard sprocket (connected to the rear tire) easier to come by.

And yes, a TAV is better. Took some spring swapping to get mine where I wanted it, but it way out performs a single speed setup for general, mixed terrain, riding around.

 

[Raskin]

Tav for sure..the launches are sweet and top end nice...the only thing I miss is the off throttle rasp on gear braking ..the exhaust note is nice..:smile: