DetailsA higher gear ratio will increase top speed. Only recommended for tuning / racing cylinders. OEM cylinders usually don't have enough power to pull this kind of transmission.
Gear ratio: 13/40 (3.07) => +13.3%
Shaft diameter = 17.7mm
Note: Piaggio changed their transmissions in 1996. The intermediate shaft between primary and secondary shaft was 18.0mm before 1996 and was changed to 17.7mm after 1996. In case you're not certain - please check the measurements!
This transmission is for models after 1996 with 17.7mm shaft.
- Additional Information
Name Polini Primary Transmission 13/40 Piaggio NRG after 1998 Item No. P202.1378 Brand Polini Type Primary
- Fits to (41)
Your product goes with the following manufacturers and their models:
Mojito Custom 50cc (Piaggio engine), SR 50cc Funmaster LC (after 07/2003) - Piaggio engine, SR 50cc LC (after 07/2003) - Piaggio Engine, SR 50cc R Factory i.e. LC (after 2005) - Piaggio Engine, SR 50cc R LC (after 2005) - Piaggio Engine, SR 50cc Racing LC (after 07/2003) - Piaggio Engine, SR 50cc Sport LC (after 07/2003) - Piaggio Engine, SR 50cc Street LC (after 07/2003) - Moteur Piaggio, Sportcity Street 50cc
Atlantis 50cc AC (after 06/2002) - Piaggio, Atlantis 50cc LC (after 06/2002) - Piaggio, Bullet 50cc AC - Piaggio, GP1 Racing / Revolution 50cc LC - Piaggio
Easy Moving 50cc AC, Ice 50cc AC, Runner 50cc LC (1999 - 2000), Runner 50cc LC (after 2004), Runner 50cc LC (before 1999), Runner 50cc LC CAT (after 2001), Runner SP 50cc LC (after 08/2004), Stalker 50cc AC (after 1999), Stalker 50cc AC (before 1999), Stalker Naked 50cc, Typhoon 50cc AC (before 2011), Typhoon X 50cc AC (before 2011)
Jet Set 50cc AC, Torpedo 50cc AC - Piaggio
Fly 50cc AC, Free 50cc AC (after 1999), Liberty 50cc AC, NRG Power DD 50 (after 2005), NRG Power DT 50cc AC (after 2005), NRG mc2 50cc LC (after 1998), NRG mc2 Extreme 50cc AC, NRG mc2 Extreme 50cc LC, NRG mc3 DD 50cc LC CAT, NRG mc3 DT 50cc AC CAT, Typhoon (TPH) 50cc AC (before 2010), Typhoon X (TPH X) 50cc AC (before 2010), Zip 2 50cc AC CAT (after 1999), Zip 2 SP 50cc LC