OEM 40mm Piston Ring for Genuine Buddy 50 & Roughhouse 50

40mm Piston Ring for Buddy 50 and Roughhouse 50 Scooters

This OEM piston ring is made for 40mm cylinder bores and helps bring back compression when you are doing a top-end rebuild. It works with a range of machines, among them the Buddy 50 and Roughhouse 50, so your scooter should run more consistently. Like other Genuine Buddy scooter parts, it sits in the same spot as the original ring, which keeps the job simple.

Function and Build

The ring has a split design that seats into the piston groove and holds compression in, which helps the engine run more smoothly. When a ring wears out or gets damaged, it can cause performance problems, so swapping it out is the fix. Checking the piston ring on a regular basis helps a two-stroke engine last longer and work more efficiently.

Fitting Notes

Swapping the ring is a simple job that means taking off the cylinder head and piston. Make sure the new ring settles correctly into the piston groove so the engine keeps its performance. A full replacement needs two rings, so it is worth buying a spare one to keep on hand.

Specifications

• Part Type: Piston ring
• Cylinder Bore Application: 40mm
• Total Diameter: 42mm
• Compressed Diameter: 39.5mm
• Inside Diameter: 38.5mm
• Ring Thickness: 1.5mm
• Ring Width: 1.75mm
• Quantity Supplied: One ring
• Quantity Required: Two rings
• Fits: Genuine Buddy 50, Genuine Rattler 50 and Genuine Roughhouse 50 (40mm bore, 2-stroke)

Compatibility

Fits:

• Genuine Buddy 50
• Genuine Rattler 50
• Genuine Roughhouse 50 (includes Sport)
• Genuine Black Cat 50
• Yamaha Jog 50cc two-stroke (matching piston-ring dimensions)
• Minarelli 50cc two-stroke (matching 40mm-bore piston and ring dimensions)

How to choose: Confirm the cylinder bore is 40mm and that the piston ring groove dimensions match before you order. A full set takes two rings.

Where it goes: part #18 on the cylinder diagram for the Buddy 50; part #18 on the cylinder diagram for the Rattler 50; part #18 on the cylinder diagram for the Roughhouse 50.

Shop more: Genuine Buddy Parts · Genuine Scooter Parts · Scooter Pistons & Piston Rings · Scooter Parts