More torque?

[redsox985]

That's tempting. I don't think I want to blow that much $$$ on tape. I love building stuff impulsively. The last trip to the hardware store for hack saw blades resulted in a $40 potato gun (which is great btw).

 

[dcook3333]

On the mini-bike. Your choice - put the new engine in and your power more than doubles. But you then lose it for building something else.

If you want something simple to wake it up - then put in the smallest drive sprocket possible. I didn't quite get your explanation. How many teeth are on it now? Sounds like more than 12. Get a #35 with as few teeth as possible. If that doesn't work, then the bigger wheel sprocket is next up...