Malossi Sport Piston Ø 40.0 mm – Replacement Piston Kit for Malossi Cylinders (Minarelli horizontal/vertical)

With the Malossi Sport Piston Ø 40.0 mm, you get a precision-fit replacement piston kit for the specified Malossi cylinder kits with Minarelli horizontal or vertical engines. Especially in heavily used 50ccm setups (e.g., in daily use or during sporty driving), the piston is a classic wear part: a worn piston including rings quickly causes significant loss of performance. With this kit, you bring your setup back to peak performance – reliably and cleanly tuned.

Fits many vehicles, such as Yamaha Aerox 50, MBK Booster or Aprilia SR 50, but also many other models with a suitable Minarelli engine and the corresponding Malossi cylinder kits.

Product Properties & Scope of Delivery

• Replacement piston kit from Malossi for the specified Malossi cylinder kits
• Piston diameter: Ø 40.0 mm
• Engine base: Minarelli horizontal / vertical
• Ideal as a replacement in case of wear (performance drop due to piston/rings)
• Scope of delivery: piston, piston rings, piston pin, piston pin locking clips

Technical Details

• Diameter: 40.0 mm
• Type: Replacement piston kit
• Use: for the specified Malossi cylinder kits
• Engine: Minarelli horizontal / vertical

Compatibility (Vehicle Selection)

This piston kit is used in many 50ccm scooters with Minarelli engines. Examples from the vehicle list:

• Yamaha: Aerox 50 / Aerox R 50 / Jog R 50 / Zuma 50 (vertical engine) / BWS 50
• MBK: Booster Spirit 50 / Nitro 50 / Ovetto 50
• Aprilia: SR 50 (AC/LC) / Scarabeo 50 2-stroke
• Malaguti: F12 Phantom 50 (AC/LC) / F10 50

Important: The piston is intended as a replacement for the specified Malossi cylinder kits. Please absolutely check the cylinder/piston size (Ø 40.0 mm) and engine type (Minarelli horizontal/vertical) before purchasing.

OEM Numbers (Comparison Numbers)

• 34 8537
• 348537

OEM no. for comparison purposes only.