Motorcycle Repair: sprocket, tire circumference, wracking my brain

Question
hi i would like to know if i put a sprocket with less tooth what do i get ? horsepower or what?

Answer
Hi Elias.

You are really wracking my brain on this one. :)  It has been a long time since I've had to worry about the sprocket size issue.  I hope you are functional in algebra, because there are a couple formulas.

For starters, a basic gearing chart is essential. It's much easier to think in terms of speed as opposed to gear ratios. Speed for a given set of sprockets is determined as follows:

Speed = (rpm X rear tire circumference X front sprocket) / (primary gear ratio X sixth gear ratio X rear sprocket X 1056)

Most of the chart usage is relative, so if you don't have all the specifications for your bike the formula can be reduced significantly to an approximation of:

Speed = (460 X front sprocket) / (rear sprocket)

Hope that helps you.
Good luck and ride safe.
FALCON