Engine casing -GP ONE CNC- Vespa V50, V90, SS50, SS90, V50 SR, PV125, ET3, PK50 S/XL, PK50 S/XL, PK80 S/XL, PK125 S/XL, PK125 ETS - Øcrank-webs=88.0mm

Engine housing milled from the full aluminium block for Vespa V50, PV125, ET3, PK50, PK80, PK125 etc.

The housing manufactured by GP One in Austria is also able to withstand the massive loads of the modern cylinder generation such as Falc 153cc or Parmakit W-Force.

In order to be able to install this cylinder class with 60mm bore, it is necessary to make modifications to the series housing, which makes the wall very thin in some places. Thus it came with very strong engines already to torn off cylinder foot photographs. Gernot Penn's housing, on the other hand, is designed to be bulletproof. Everywhere enough massive aluminium as well as some clever detail improvements give also engines with clearly over 30hp at the rear wheel a safe basis.
(machine-translated)