Product Details
Description
Malossi, MHR Cyl Kit; Buddy 50/Yamaha Vino etc.
Replacement Part Details
Use this part when the original component is worn, damaged, missing, or no longer working correctly. Many scooter parts can look similar but use different sizes, plugs, brackets, thread patterns, or mounting styles, so careful comparison before purchase is recommended.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Fits Models / Common Applications: Genuine Buddy and Yamaha and other compatible models may apply.
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit a Genuine Buddy?
A: This SKU is listed with Genuine Buddy model fitment where the scooter also matches the listed engine or fitment notes.
Additional information
| Weight | 5.25 lbs |
|---|---|
| Dimensions | 11.5 × 7 × 6.25 in |
The Malossi MHR cylinder kit is a 70cc big-bore top-end kit for air-cooled horizontal Minarelli 2-stroke engines. This is a replica of the cylinder Malossi uses on its own racing team — Nikasil-lined aluminum cylinder for reduced friction and superior heat dissipation, paired with an HTSR aluminum cylinder head and a 47mm Asso forged piston. Fits Genuine Buddy 50, Roughhouse 50/Sport, Yamaha Jog, Zuma 50, and Vino 50 2T. Made in Italy.
Replacement pistons (10mm wrist pin) and piston rings are available separately.
- 70cc displacement — up from stock 50cc
- Nikasil-lined aluminum cylinder for reduced friction and heat dissipation
- HTSR aluminum cylinder head (Malossi racing spec)
- 47mm Asso forged aluminum piston
- 10mm wrist pin with needle bearing
- Includes 2 piston rings, circlip, base gasket, and head gasket
- Made in Italy by Malossi
- Displacement: 70cc
- Bore: 47mm
- Wrist Pin: 10mm
- Cylinder: Nikasil-lined aluminum
- Head: HTSR aluminum (Malossi racing spec)
- Piston: 47mm Asso forged aluminum
- Kit Includes: Cylinder, HTSR head, 47mm piston, 10mm wrist pin, needle bearing, 2 piston rings, circlip, base gasket, head gasket
- Engine Type: Air-cooled horizontal Minarelli 2-stroke
- Origin: Italy
- Malossi Part No.: M318437
| Make | Model |
|---|---|
| Genuine | Buddy 50 |
| Genuine | Roughhouse 50 |
| Genuine | Roughhouse 50 Sport |
| Yamaha | Jog 50 (2T) |
| Yamaha | Zuma 50 (2T) |
| Yamaha | Vino 50 (2T) |
| Various | Air-cooled horizontal Minarelli 2-stroke 50cc engines |
Not intended for use on public roads or land.





