what gear ratios to use?

[r.r.racing]

Hi I have built a minibike with a Honda 5.5hp degoverned and uprated to about 9hp. It has 16" wheels including tyres .It also has a jackshaft and I am a bit puzzled on what gearing to use. I am not looking for top speed or torque just something in the middle.

 

[jdogg]

Hope this helps! :thumbsup:

Mini Bike Speed Calculator (MPH)

 

[Havasu Dave]

Running a jackshaft, so try this link. I downloaded the excel file on my machine and use this all the time. Second time today I posted this link from InventorPardue here.

http://www.parduebrothers.com/minibike/ratiospeed.xls