NCY GY6 50/QMB139 50mm bore Cast Iron Cylinder Kit w/o head. The perfect upgrade for most QMB139/GY6 50 Scooter, this bolt-on 81cc kit will really give your scooter some go. Its recommended to get part number 1100-1239, 50mm big valve head as well, as most stock heads will not fit.
In addition, we really recommend 1100-1250, NCY Performance Camshaft as an amazing complimentary item to this kit. It will allow the kit to perform to its maximum potential and go 50-55 MPH!
Have a look at our Decompression Tube Assembly (1100-1282) which replaces your dipstick and allows excess crankcase pressure to be released. Good idea to install one of these alongside any cylinder kit upgrade.
- Applies to the following models:
- Baccio
- Runner 50
- Jonway
- YY50QT-21A 50
- YY50QT-6A 50
- Peace
- TPGS-804 50
- TPGS-805 50
- TPGS-808 50
- Roketa
- Bahama 50
- SunL
- SL50QT-7 50
- Tao Tao
- CY50-A 50
- CY50-D 50
- TN'G
- Milano 50
- Verucci
- Avispa 50