Polini Corsa 70cc Racing Cylinder Kit for Yamaha Zuma, Roughhouse & Buddy 50

Polini Corsa 70cc Cylinder Kit for Yamaha Zuma and Similar Scooters

The Polini Corsa 70cc Racing Cylinder Kit is built to raise performance on scooters such as the Yamaha Zuma. It suits riders who want quicker throttle response and a higher RPM range. It is one of the Yamaha Zuma scooter parts that can lift your ride's output while still holding up for daily riding.

Factory Ported for Added Power

The cylinder comes factory ported, which helps improve scavenging and gives more top-end power than standard kits. Its thermal-resistant cast iron body handles heat well, so it is suited to hard riding. The kit also includes chrome-plated piston rings, which lower friction and help maintain a tight seal at higher speeds.

Compatibility and Setup Notes

This kit is made for 2-stroke engines built on the Minarelli design. Riders should raise the oil-to-fuel ratio to avoid engine trouble. For the best results, pair it with a 17.5mm or 19.1mm carburetor and a suitable mid-race expansion chamber exhaust.

Specifications

• Displacement: 70cc
• Bore Diameter: 47mm
• Wrist Pin Size: 10mm
• Material: Cast Iron Cylinder / Aluminum Piston
• Cooling: Air Cooled
• Fits: Genuine Roughhouse 50 and Genuine Buddy 50 horizontal Minarelli 50cc 2-stroke engines (10mm wrist pin)

Fitment

Fits:

• Genuine Roughhouse 50
• Genuine Buddy 50
• Genuine Rattler 50
• Genuine Black Jack 50
• Yamaha Zuma 50 (2002-2011)
• Yamaha Vino 50
• Yamaha Jog (horizontal)
• Aprilia SR50 (pre-2000 Minarelli engine)
• Malaguti F12 Phantom
• Malaguti F15 Firefox

How to choose: Confirm that your engine is a horizontal Minarelli-based 2-stroke with a 10mm wrist pin. This kit does not work with AF05E engines (pre-1994 model years).

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