A ring compressor may be necessary in order to install the piston in the cylinder included in this kit.
50cc scooter cylinder kit is great for increasing overall performance on small underpowered 50cc GY6 QMB139 scooter engines.
Engine kit increases engine bore size from 50cc to 72cc and includes everything shown in the image; cylinder, rings, gaskets, roller weights, and more.
This kit also comes with the cylinder head and valves and is our most complete 50cc engine upgrade kit available.
This 72cc scooter engine kit increases low end acceleration as well as top speed.
This high performance scooter engine kit is easy to install. Combine with a high performance carburetor and high performance exhaust and get peak performance from your 50cc gas scooter.
Note: This high performance cylinder kit is only compatible with 4-stroke 50cc GY6 engines.
Bore: 46 mm
Piston Height: 33 mm
Cylinder/Cylinder Head hole spacing: 50 mm x 50 mm
Piston Wrist Pin Diameter : 12 mm
Piston Wrist Pin Length: 37 mm
Compression height : 17 mm
Ring Diameter: 47 mm
TankŪ Urban 50 Scooter Parts
12 Volt YTX5L-BS Sealed AGM Scooter, ATV, and Dirt Bike Battery (Premium)
| 3.50-10 Tubeless Scooter Tire
| 12 Volt Electric Starter Motor for 50cc QMB139 Scooter Engines
| CDI Module (Ignitor) for 50cc, 70cc, 90cc, 110cc, & 150cc Gas Scooters & ATVs - 5 Pin Square Connector
| High Performance "No Rev Limit" CDI Module (Ignitor) for 50cc, 70cc, 90cc, 110cc, 125cc, & 150cc Gas Scooters & ATVs
| 4-Pin Rectifier (Voltage Regulator) for 50cc-150cc GY6 Scooter Engines
| Ignition Coil for 50cc-150cc GY6 Scooter, ATV, & Dirt Bike Engines
| 12 Volt Starter Relay for Electric Start 50cc, 90cc, 150cc, & 250cc Engines
| 669-18-30 50cc Gates Powerlink Scooter & Go Kart CVT Belt
| 669-18-30 50cc Scooter CVT Belt
| View More ...