Kimpex Front Drive Sprocket Honda
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Gearing selection can affect acceleration, top speed and even handling. By changing front and rear sprockets you can alter your bike’s or your ATV’s final drive ratio, which in part determines when speed for a given rpm. Gearing ratio refers to the ratio of the rear to front sprockets. The sprocket selection can be advantageous: at a given road speed, and in a given gear, shorter gearing will have the motor spinning faster, where more power is available.
For example, a stock Suzuki GSXR600 has a 16 tooth front sprocket, and a 45 tooth rear, for a ratio of 45/16, or 2.81. Stock bikes are generally geared to reach their top speeds at just below their peaks in top gear.
- Substituting a larger front or smaller rear sprocket (46/15) lowers the ratio (sometimes called “taller” gearing), resulting in more speed for a given engine rpm. It would pass its power peak early, also resulting in a slower top speed, because in sixth gear the engine would spin much slower and not make enough power to pull its top speed.
- Likewise, a smaller front or larger rear sprocket (44/17) gives less speed for a given rpm (“shorter” gearing).
Performance numbers can be enhanced by sprocket selection to a certain extent, but the overriding factor is your engine’s power and its characteristics. Choosing the correct gearing optimizes your power band usage, maximizing power delivered to your rear wheel for the given conditions.
A popular modification is to replace a stock machine’s 530 or 525 chain with a thinner and lighter 520 series chain and matching sprockets.