[sportrider - tech] - Ask The Geek: Thrust, Horsepower And Rear Tire Handling

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Ask The Geek: Thrust, Horsepower And Rear Tire Handling

Your Abnormal Guide To Things Abnormal.Thrust And Horsepower
When you look at a dyno chart, you see that a bike might have a horsepower rating of 65 at 4000 rpm. Say your primary drive ratio is 2.000, the final drive is 1.500 and the gear you are in has a ratio of 1.000. You multiply 2.000 x 1.500 x 1.000 and get 3 (which would be your overall gear ratio), then take that and multiply it by your 65 horsepower. Does that equate to 195 horsepower at the rear wheel? Is that what your bike is putting down, or is it already figured in when you look at the dyno chart? Can you compare two dyno charts and gear ratios to see which bike might be faster? If this is the case, then a higher dyno number does not always equal a quicker bike, right?
James Patterson
Erin, TN


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