Big Bore Kit: Upgrade Your GY6 50cc To 80cc - Cylinder, Piston & Rings For 139QMB Scooter/Moped

Want more power out of your 50cc scooter or moped?

This big bore kit is the way to go.

It's designed for GY6 engines, specifically the 139QMB, and bumps your displacement up to 80cc.

The kit includes a brand new cylinder, piston, and rings.

The cylinder itself is cast aluminum with a steel lining, so it's built to last and handle the extra heat and pressure.

It's a brand new, unbranded kit, but it comes in its original packaging and includes everything you need for the top end rebuild.

If you're looking for a cheap and effective way to get a little more grunt out of your ride, this bolt-on kit is a solid choice.

Just make sure you're comfortable with engine work, and you'll be scooting around with that extra power in no time.