72cc Big Bore Kit 47mm for Buddy / Roughhouse / Yamaha Zuma 50cc

72cc Big Bore Kit for Buddy, Roughhouse, and Yamaha Zuma

This 72cc big bore kit is designed to increase output on several scooter models, among them the Buddy, Roughhouse, and Yamaha Zuma. It pairs a hard-wearing iron-bore cylinder with a performance aluminum cylinder head, so it suits riders who want a dependable option. If you're browsing Yamaha Zuma scooter parts, this is one item that can make a real difference to how your scooter rides. Many riders swap out original components to gain quicker pickup and better overall engine efficiency.

Cylinder and Piston Details

The kit comes with an iron-bore cylinder that has a 4-bolt head pattern and cooling fins to help shed heat. Also included is a 47mm flat-top piston cast from forged aluminum, along with two piston rings for a tight seal. A 10mm wrist pin and circlips hold everything together during assembly, so this kit is a sound upgrade for your scooter.

When to Consider Replacement

If you notice weaker power or slow acceleration, upgrading to this big bore kit may be worth considering. Swapping out the stock parts can bring a clear gain in performance, particularly for riders who often take their scooter off-road. The kit is built specifically for 2-stroke Minarelli horizontal engines.

Specifications

• Displacement: 72cc
• Bore: 47mm
• Wrist Pin: 10mm
• Piston Rings: 2 included
• Engine Type: 2-stroke Minarelli horizontal
• Fits: Genuine Buddy 50 and Roughhouse 50 with Minarelli horizontal 2-stroke 50cc engines

Fitment

Compatible with:

• Genuine Buddy 50 (2-stroke Minarelli horizontal engine)
• Genuine Roughhouse 50 (2-stroke Minarelli horizontal engine)

How to choose: Confirm your engine is a 50cc Minarelli horizontal 2-stroke with a 10mm wrist pin and 47mm bore. The kit also needs carburetor re-jetting once installed.

Shop more: Yamaha Zuma Parts · Genuine Buddy Parts · Scooter Big Bore & Cylinder Kits · Scooter Parts