72cc 47 mm High Performance Big Bore Cylinder Kit for 50cc QMB139 Scooter Engines Afikim Electric Vehicle SE and power button

and power button

the rear left wheel assembly for the Pulse ATV Quad Ride-On features a steel rim with bearings and a steel lock collar

These 12-3/4" (eye to eye) beauties are sold as a pair and are the the 'kart doctor's prescription for a smoother

The tire is flat-free

Waterproof

72cc 47 mm High Performance Big Bore Cylinder Kit for 50cc QMB139 Scooter Engines Afikim Electric Vehicle SE and power buttonOur 72cc scooter big bore cylinder kit is great for increasing overall performance on small under powered 50cc QMB139 scooter engines. Engine kit increases engine bore size from 50cc to 72cc and includes everything shown in the image; cylinder, rings, and gaskets. This 72cc scooter engine kit increases low end acceleration as well as top speed. This high performance scooter big bore engine kit is easy to install. Combine with a high performance