Secondary transmission Aprilia SR / Gilera Runner 125/150/180cc 2-Stroke 15/41 Malossi

Transmission ratios extend the final drive ratio of the motorcycle. If the engine has enough power and can handle a longer transmission ratio, the top speed increases. The original cylinder in most cases does not have enough power, so it will need to be replaced with a more powerful one. If you are not sure which is the ideal transmission for your setup, please contact us.