Malossi Sport 50ccm Cylinder Kit – noticeable increase in performance for Minarelli (vertical)

With the Malossi Sport 50ccm Cylinder Kit, you get a powerful grey cast iron cylinder with standard bore (40 mm) – ideal if you want reliably more pressure than with the original standard cylinder without immediately opting for a displacement upgrade. Through optimized timing and an enlarged exhaust port, the setup delivers very cleanly in everyday use and typically provides approx. 2–3 hp more than a standard cylinder.

Especially on popular scooters such as MBK Booster or Yamaha BWS / Zuma with a vertical Minarelli engine, the kit is a proven choice if you are looking for sporty but stable performance. And if you ride, for example, an MBK Booster or a Yamaha BWS / Zuma: according to recommendations, the kit harmonizes particularly well with exhaust systems such as Yasuni Z or Laser XPro.

Features & Benefits

• 50ccm Sport cylinder with 40 mm standard bore
• Grey cast iron cylinder – robust and suitable for everyday use
• Optimized timing for better filling and performance
• Enlarged exhaust port for improved gas flow
• Performance increase of approx. 2–3 hp compared to standard
• Very good combination with Yasuni Z or Laser XPro

Scope of Delivery

• Cylinder
• Piston
• Head
• Gaskets

Technical Details

• Displacement: 50 ccm
• Bore: 40 mm (standard)
• Material: Grey cast iron
• Engine type: Minarelli vertical

Compatibility (Excerpt)

Fits many vehicles with a vertical Minarelli engine, such as MBK Booster and Yamaha BWS / Zuma – but also many other models. Here is the full list:

• Adly: Her Chee, 50 Her Chee
• Aprilia: Amico 50 1991-1993, Amico 50 Sport, SR 50 AC Air 1994, Amico 50 GL
• Ering: Silver Fox 50
• Fantic: Motor Big Wheel 50, Motor Pony 50 SR
• Italjet: Yankee 50, Bazooka 50, Scoop 50, Pista 2 50, Pista 50, Reporter 50
• Itteco: PT 50, Cool 50
• Karcher: KM 50 Hurricane
• LEM: Ghibli 50 2-stroke, Flash 50, Tornado 50 2-stroke
• MBK: Sorriso 50, Booster Track 50, Booster Rocket 50, Stunt 50 2004, Stunt Naked 50, Booster Spirit 50, Target 50, Booster 50 12 inch 2004, Booster 50 One 2DW, Booster 50 NG 1999
• Yamaha: Zuma II 50 vertical engine, BWS 50 12 inch 2004, Beluga 50, Target 50, Slider 50 2004, Spy 50, Zuma 50 vertical engine, BWs 50 Original SA231 2011, BWS 50 NG 1999, BWs 50 Naked SA231 2016

OEM Numbers (for comparison purposes)

• 31 6901
• 316901