Best rear tooth for a 10T CFC?

[Sinsinx]

Hey, doing a homemade build with a pred engine, and was curious about my rear tooth sizing. I must be entering the calculator numbers wrong, because with my 10-tooth Centrifugal Clutch I would need a 100 or higher tooth rear sprocket to get low enough gearing to even be useable...?

Clutch is similar to this: http://www.ebay.com/itm/GO-KART-CLU...KE-CENTRIFUGAl-TORQUE-CONVERTER-/360752534084

hooked up to a 79cc pred/greyhound/hf engine....

 

[MotorBicycleRacing]

Your calculations are correct.

4 stroke builds like yours need a jack shaft for more gear reduction.

there are lots of 99 cc predator builds here to get ideas from.