Polini Contessa 72cc Big Bore Kit for Minarelli 2T

Polini Contessa 72cc Big Bore Kit for Minarelli 2T Scooters

The Polini Contessa 72cc Big Bore Kit offers a practical power upgrade for horizontal Minarelli 2-stroke engines. It raises engine displacement from 50cc to 72cc, which adds power. The kit is built for simple installation and tuning, so it suits riders who want a better ride. It is one of the Minarelli 50cc / Yamaha Jog scooter parts that can boost performance without a lot of extra work.

Build and Components

The kit uses a cast-iron cylinder, which offers long wear life and good heat retention. Its aluminum piston ships with two piston rings and a 10mm wrist pin with circlips for a dependable fit. Two 6mm exhaust studs are included for a firm mount.

Performance and Tuning Notes

The design is uncomplicated, so setup and tuning are fairly direct, and the kit delivers a noticeable gain in output. You can expect quicker acceleration and better response without complicated jetting or further engine changes. Before running the engine at full throttle for long periods, ride it for 200–300 miles to break it in.

Specifications

• Displacement: 72cc
• Piston Diameter: 47mm
• Piston Rings: 2x 47mm
• Wrist Pin: 10mm (with circlips)
• Cylinder: Cast iron
• Exhaust Studs: 2x M6
• Dimensions: 7.5" L x 6" W x 5" H
• Fits: Minarelli horizontal 2T engines: Yamaha Zuma, BWS, Vino, Jog 50 and Buddy, RoughHouse, Rattler 50

Compatibility

Fits:

• Yamaha Zuma 50 (2T)
• Yamaha BWS 50 (2T)
• Yamaha Vino 50 (2T)
• Yamaha Jog 50 (2T)
• Buddy 50
• RoughHouse 50
• Rattler 50
• Aprilia SR (pre-2000)
• Adly (various models)
• Universal (Minarelli horizontal 2T engines)

How to choose: Confirm that your engine is a 2-stroke Minarelli horizontal unit with a 47mm bore, which is the size this kit is designed for. The stock 50cc engine is the starting point that this kit enlarges to 72cc.

Browse more: Minarelli 50cc / Yamaha Jog Parts · Scooter Big Bore & Cylinder Kits · Scooter Parts