Performance GY6 50cc (139QMB) 72cc 47mm Piston Kit with Rings
ITEM# TT-15438
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Description
47mm Piston Kit for GY6 50cc Engines
This 47mm piston kit is built for GY6 139QMB 50cc engines and gives your scooter a noticeable performance boost. Fitted into a big-bore cylinder, it brings the total displacement up to roughly 72cc, which makes it a budget-friendly way to refresh your engine instead of buying a whole new unit. It is one of the GY6 50cc scooter parts suited to riders who want more go for off-road use.
Complete Piston Assembly
Everything needed for installation is included in this kit: a piston, piston rings, a 13mm piston pin, and two pin clips. Because the components come together as one assembly, they are designed to match, so a big-bore rebuild can be carried out without hunting down extra parts.
Durable Ring Set
The rings are matched to the 47mm bore to create a proper seal and keep engine compression where it should be. If only the piston components are worn, replacing them can bring back lost power without buying a complete kit.
Specifications
- Piston Diameter: 47mm
- Displacement: Approximately 72cc
- Piston Pin Diameter: 13mm
- Included: Piston, piston rings, piston pin, and 2 clips
- Base Engine: GY6 139QMB 50cc
- Fits: 47mm big bore cylinders on GY6 139QMB 50cc engines (not for a stock 39mm 50cc cylinder)
Fitment
Fits:
- GY6 139QMB 50cc engines with 47mm big bore cylinder
How to choose: Check your cylinder bore first. This piston measures 47mm, so it only suits a 47mm big bore cylinder. Confirm that your piston pin is 13mm.
Shop more: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Pistons & Piston Rings · Scooter Parts
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