larger sprocket on engine smaller one on axle?

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d12346

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When I had a minibike my uncle was telling me in the 70s he took a larger sprocket on the front and a smaller on on the back. So my question is would this work? So say if I had a 60 tooth sprocket on the front and a 12 tooth on the axle would that be any different then a 12 tooth on the engine and a 60 tooth on the rear?
 

itsid

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yes that would be very different...
you'd have 25 times faster spinning rear wheel (25 times the speed)in theory
and a no longer running bike (ZERO speed) in practice

He was refering to a bicycle, not a mini bike... two very different things.

'sid
 
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