how fast will a doodlebug go with a 6.5 engine

#3
it will do eleventy miles an hour.

try this: go-kart racing Gear Ratio Calculator

it's pretty much dead on if i'm running 5800rpm with my combination (they show 40.2~ and i did 40.2 on the GPS with it wound out to the point i was worried about the flywheel). i've got an ungoverned 5.5 clone.

it doesn't top out that high, but it gets there damn quick. where i ride now i'm hitting 35-37mph with normal riding.
 
#5
with stock gearing and the gov removed I got 41mph out of my red one (the engine is screaming)

my orange bike with the TAV goes 44mph, but the motor dosen't seem to be revving as high. I think the overdrive ratio on the TAV dosen't allow the engine to rev out completly
 
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