The Piaggio NRG is a scooter made by Piaggio from 1994 to 2020. History The first model (mc1) used a liquid-cooled, two-stroke engine. The mc2 differed from the mc1 only visually and later models (since 1998) had optional air-cooling and rear disc brakes (the Hi-Per2 engine). The mc3 saw not only further visual improvements, but also a rev counter, the new Hi-Per 2 engine, air-cooling (optional), rear disc brakes (optional) and direct fuel injection (optional). The NRG Power (introduced in 2005) changed drastically from the fairly similar 3 previous models. The NRG Power and mc3 were supplied in three versions: NRG Power DT / NRG mc3 DT (air-cooled, rear drum brakes) NRG Power DD / NRG mc3 DD (liquid-cooled, rear disc brakes. DD stands for "Double Disc") NRG Power PureJet / NRG mc3 PureJet (direct fuel injection) Piaggio and Gilera have produced models similar to the mc1: NTT (10 inch rims and a front splitter) Piaggio Typhoon / Gilera Typhoon (10 inch rims, different front body, air cooling) Piaggio Storm / Gilera Storm (13 inch rims, Typhoon front body, air cooling) Models Piaggio NRG mc1 (1994-1996) Piaggio NRG mc2 (1996-1998) Piaggio NRG mc2 DD / mc2 extreme (1998-2000) Piaggio NRG mc3 DD / DT / PureJet Piaggio NRG Power DD / DT / PureJet (since 2005) Piaggio NRG mc4 References External links Official website NRG Motorcycles introduced in 1994 Mopeds Two-stroke motorcycles