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Dirt Bike Final Drive Gearing
TBolt USA Tech Database!



For Faster Acceleration (lower gearing)
Lower gearing with make each gear shorter and make you shift thru the gears faster
Use a small front sprocket (countershaft) or larger rear sprocket.
For every 1 tooth you change on the front, it is the equivalent to changing 3 teeth on the rear.
Creates a lower gearing ratio. This is ideal for tight trail riding or tracks without many long straight sections.
A lower gear ratio works well for Arenacross opposed to wide open desert racing.

For Faster Top Speed (higher gearing)
Higher gearing will allow each gear to be used longer
Use a larger front sprocket or smaller rear sprocket. Again, changing the front makes a larger impact to your gearing than changing the rear.
Creates a higher gearing ratio. Higher gearing ratios work well in high speed situations such as desert riding, sandy motocross type tracks or anywhere that does not have very many tight turns.
As a general rule, for every tooth change on the front sprocket you are changing the rear sprocket by approximately three teeth.
If you are looking for a subtle change in your gearing, add or reduce 1-2 teeth on the rear sprocket.

General rules for Pit bikes
If your running MX tracks you want be in 3rd gear most of the time
Drop into second on turns , hit 4th only on longest straights
Most Pit bikers change the front because its cheap to do

China Bikes
Pist bikes have a very low 1st gear
Most guys go to a 17T tooth front right away to allow 1st gear to be usable

Japaneses Bikes
Find out what ratio you bike came with stock then adjust 


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