Doppler Primary Transmission 13-37\/13 Piaggio Typhoon \/ NRG

Doppler Primary Transmission 13\/37 Piaggio Typhoon \/ NRG. Taller gears reduce the overall gear ratio of your transmission and will result in improved acceleration, a higher gear ratio increases top end speed.OEM engines usually don’t have enough power to pull this kind of transmission, so you will need a sports or racing cylinder.

Get rid of your old gear, grab this Doppler transmission, mount it and give’r!

Details:

primary transmission: 13\/37mount: pre-pressed