Introduction
This tuning guide is intended for the latest Piaggio/Gilera year 2000 scooters which have the Hi-Per 2 engine with anti-tamper and catalytic converter exhaust with air bleed system. The performance parts that have been used will also fit earlier engines without having to modify the crankcase. These early engines have 12mm carbs and therefore a new 17.5mm carb is required to obtain the same performance as the modified Hi-Per 2 engine described in this guide.

Dyno photo Air Cooled Piaggio 50 Motor Standard v. Tuned with and without Torque Driver
Tuning Parts: DR Air-Cooled 75cc Kit, Eurocilindro 0.25mm Reed Petals, LeoVinci ZX Expansion, Malossi Front Pulley and Gear Kit

The Hi-Per 2 engine is available in both air-cooled and water-cooled format. The air-cooled motor is used in scooters such as the Zip 50 2000 Catalyst. The water-cooled engine is used in scooters (?) such as the DNA 50.
The modifications we have detailed below were carried out in our workshop on the Zip 50 2000 scooter. Please note that general tuning and derestricting information for earlier models is detailed in our other tuning guide titled Piaggio Auto 50’s & 80’s.