Quote:
Originally Posted by Somchai
Sorry guys to contradict you, but you're talking about gear ratio and not torque.
Torque means power from/in the engine and more torque is possible i.e. with advanced ignition or different camshafts and for sure also with more cc...
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Any time that the output gear (rear sprocket) has more teeth than the input gear (crankshaft), then the gear/sprocket train amplifies the input torque and reduces rotational speed.
As power (HP) is the product of torque (rotational force) and rotational speed (rpm), it remains the same though the gear/sprocket train (actually, some power is lost along the train due to friction).
Of course, increasing the power that the engine generates, the output torque (force on the rear contact patch) increases as well, for the same transmission ratio.
https://www.ninjette.org/forums/show....php?p=1035290
https://en.wikipedia.org/wiki/Mechanical_advantage
