Secondary gears -MALOSSI- Minarelli 50 cc 2T MA/MY- 14/43 = 1:3,07

Extending the gear ratio makes sense if the engine power has been increased by successful tuning measures. With the extended gear ratio, you can convert your extra power into more speed.
In addition, the cylinders and the rest of the engine are protected, because they no longer have to be turned up so high.

In series engines, a longer gear ratio is usually not useful, because the power is in most cases not enough to convert the ratio plus into top speed._{AI-translation}