Due to supply Problems we are simply updating our 47mm kits to 50mm (80cc) NCY Kits are better quality with larger displacement.

Don"t get stuck with small 47mm kit when you can have the best quality and power with 50mm NCY. These are quality kits not from China with a brand name, alot of companies advertise 80cc kits which are really 70cc kits at 47mm.

Scootertronics offers NCY Upgrade Parts.

Kit Includes
• Cylinder
• Piston, Rings
• 50mm Head (Bored Out)
• Gaskets Head and Base
• Air Filter
• 88 Jet
• CD Manual

This kit works well with new air filter and jet which we include also for fine tunning plus we suggest electrical upgrade also for better spark and easier starting and roller weights.

GY6 50 scooters. Kymco, Schwinn, QLink, Diamo, Avanti, Geely, Tank, Verucci, Qingqi, Roketa, Meitian and most scooters with GY6 50 139QMB four stroke engine made in Asia and China.

Vento and Pep Boys Scooter Owners, these kits will not fit these scooters. These two brands are made in same factory and use parts that do not match up to ours.

We are now offering a kit made special for Vento, Tomos, SYM plus Pep Boys Baja series scooters. Ask for this kit in check out if you one of these scooters.

CD Manual Included

Also do not forget your clutch roller weights and belt to use this new found power for better take off and no slip with Kevlar belt. Good size for roller weights for botttom end and not losing top end is 5 - 6 gram weights depending on riders weight lower for heavier 6 gram all around size then 5.5 for extra slam.



Because the Chinese do not follow each other very close some mods may have to be done to some engines for cylinder to fit. All high performance is for offroad use only.