Motor Bike's Torque

What model of engine, and why not ask the manufacturer?

The torque starts at the bottom left of the graph and progresses towards the upper right of the graph as RPM increase. Anymore questions?

Dear Fredski-where can I find any relevant graph?

As Mr Tornado asked...you need to tell us what type of engine you want to work with? What size in CC, what year was it manufactured?

Torque and HP curves vary significantly between different engines, even of similar sizes. This has to do with many variables including stroke, bore, piston profile, spark advance and curve, ignition system, valve size, cam profile, type of carb/F.I., intake manifold, air filtration, exhaust type and tuning. If you don't care about a specific engine, then I would suggest going to a manufacturer's website and get a torque graph from them. If you can't find it directly from the manf., I would google it directly. Good luck.

The relevant graph might look something like this description:

Let the x-axis be rpm, say 0-8000 for example. Let the y-axis represent % of maximum rpm and torque. On the left you could have torque in lb-ft; on the right you could have hp.

The torque curve will rise faster than the hp curve, and will peak at around 3000 rpm, falling off thereafter. (It won't fall to zero, but maybe 70% [?] of peak value.) The hp curve will rise (almost) all the way to max rpm, faster at first and slower later on.

Both curves will bow upward.