Jackshaft Gearing

[jacksontuitui]

Hey guys.
ive got a 12t clutch on the motor to a 13 on a jackshaft that spins a 17 back to a 54 on my rear wheels and from top to bottom wheels are around 10", how do i figure out my top speed from this?? highest rpm will be around 5500 ish

 

[capguncowboy]

according to this calculator, you'd be running about 70 mph

Speed Calculator For Go Karts and Mini Bikes

Just add the clutch sprocket and output sprocket on the jackshaft together, and add the input sprocket on the jackshaft and rear sprocket together (29 and 67)

 

[jacksontuitui]

wow crap thats fast!!!are you sure thats how it works with the jackshaft sizes though? :thumbsup::thumbsup:

 

[jacksontuitui]

according to this calculator, you'd be running about 70 mph

Speed Calculator For Go Karts and Mini Bikes

Just add the clutch sprocket and output sprocket on the jackshaft together, and add the input sprocket on the jackshaft and rear sprocket together (29 and 67)

wow crap thats fast!!!are you sure thats how it works with the jackshaft sizes though?

 

[Motra]

Your gearing works out to be 47.5249 MPH with not much power (not sure what your engine is though). You could switch the 13T and 17T so you're running 12T to 17T, then 13T to 54T. With this combo you'd be at 27.7914 MPH with more power.