NCY GY 50/QMB139 47mm bore, Cast Iron, Cylinder Kit w/o head
Our most popular big bore kit for the QMB139/GY6 50 scooter engine, this bolt on 72cc kit really performs nicely when you combo it with part # 1100-1250, NCY Performance Camshaft. Don't forget to upjet!
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Have a look at our Decompression Tube Assembly which replaces your dipstick and allows excess crank case pressure to be released. Good idea to install one of these alongside any cylinder kit upgrade.
- Applies to the following models:
- Baccio
- Runner 50
- Fly Scooters
- Il Bello 50
- Jonway
- YY50QT-21A 50
- YY50QT-6A 50
- Kymco
- Agility 50 4T
- Like 50
- Lambretta
- UNO50
- Peace
- TPGS-804 50
- TPGS-805 50
- TPGS-808 50
- Roketa
- Bahama 50
- Schwinn
- Sport 50
- SunL
- SL50QT-7 50
- Tao Tao
- CY50-A 50
- CY50-D 50
- TN'G
- Milano 50
- Verucci
- Avispa 50