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A higher gear ratio will increase top speed. Only recommended for race tuning cylinders. Stock cylinders generally do not have enough power to pull this type of transmission. A higher...

A higher gear ratio will increase top speed. Only recommended for stroke adjustment cylinders. Stock cylinders usually don't have enough power to pull this type of transmission.

The transmission is the final stage of power transmission to the rear wheel. By changing the ratio of the primary or secondary transmission, you can achieve a significant increase in...

The transmission is the last stage in the transmission of motion before the rear wheel. By changing the ratio of the primary or secondary transmission, you can get a considerable...

The transmission is the last stage in the transmission of motion before the rear wheel. By changing the ratio of the primary or secondary transmission, you can get a considerable...

This is the Polini 13/44 primary transmission for Bws/Zuma 50F & 50X. Installing this Polini primary transmission allows you to lengthen your transmission ratio. This will give you more extension...

Taller gears reduce the overall gear ratio of your transmission and will result in improved acceleration, a higher gear ratio increases top speed. OEM engines usually don't have enough power...

Taller gears reduce the overall gear ratio of your transmission and will result in improved acceleration, a higher gear ratio increases top speed. OEM engines typically don't have enough power...

Top Performance 16/41 secondary transmission for longer gears and increased top speed. A close gear ratio improves top speed. Of course, this type of transmission requires a powerful engine to...