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GY6 50/80cc Big Bore Kit

GY6 50/80cc Big Bore Kit

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Regular price:$329.99
Sale price:$289.99You Save 12%
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GY6 50/80cc Big Bore Kit
GY6 50/80cc Big Bore KitGY6 50/80cc Big Bore Kit

GY6 80cc 50mm Kit includes Racing Head with Racing Valves only at Scootertronics



You get everything you need to upgrade your scooter to 80cc including cam shaft jet and air filter, the head has been updated with racing valves for even better performance



No one else offers what we do or has done it as many times as we have since 2003 the cost more its well worth it if it takes a day longer to get its even more worth it plus you can call us we work everyday unlike Ebay who do not have phone numbers.

80cc Cam Shaft plus all new 50mm Racing Head with Racing Valves for a much bigger bang for your buck.

New Rocker Arm Assembly in stock if needed 19.99 this will be needed if your stock rocker arms do not touch valves stems. There is only one type of NCY head with valves so we can not trade heads with longer valve stems so we have a rocker arm assembly that does the trick.

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 from china that fail quickly.

Be careful they sell these as 100cc and they are 47mm which is 70cc with a stock head with same size valves with a bore out to accept 47mm piston. These are stock kits that are sold in scooters in Asia and there are still some brands of scooters that have 47mm kits in them and I have seen folks buy these scooters than buy a kit that matches what they have and I know both brands who are doing it. Call for info 240 377 8719

Scootertronics offers NCY Upgrade Parts.

    Kit Includes
  • 50mm Cylinder
  • Piston, Rings Gaskets
  • 50mm Racing Head Head (Bored Out with larger valves)
  • Racing Valves Installed
  • Gaskets Head and Base
  • Air Filter UNI Dual or EMGO Chrome Cone
  • 95 Jet 45 Pilot


If I have stock of 52mm kits I will send for the 50mm but you have to ask in comments at checkout, this way I know you read my info.

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

Dr Pulley 6gram weights work well for all around performance with this kit.

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.

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 bottom 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.



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