NCY 61mm Big Bore Kit Cylinder Head for 125cc – 150cc GY6 Scooters, ATVs, and Go Karts COMPATIBILITY: Amigo – 150cc Scooters, ATVs Apollo – 150cc Scooters, ATVs, Go Karts Baotian – 150cc Scooters Baron – 150cc Scooters Bintelli – 150cc Scooters BMS – 150cc Scooters, ATVs, Go Karts Coolster – 150cc Scooters, ATVs, Go Karts Diamo – 150cc Scooters, ATVs Flyscooter – 150cc Scooters Gorilla Motor Works – 150cc Scooters Ice Bear – 150cc Scooters, ATVs, Go Karts Italica – 150cc Scooters JCL – 150cc Scooters, ATVs, Go Karts Jonway – 150cc Scooters Kandi – 150cc Scooters, ATVs, Go Karts Kinroad – 150cc Scooters, ATVs, Go Karts KMD – 150cc Scooters, ATVs, Go Karts Lance – 150cc Scooters, ATVs, Go Karts Leike – 150cc Scooters Linhai – 150cc Scooters Longbo – 150cc Scooters Motobravo – 150cc Scooters, ATVs, Go Karts Motofino – 150cc Scooters Motorino – 150cc Scooters NST – 150cc Scooters, ATVs, Go Karts Peace – 150cc Scooters Puma Cycles – 150cc Scooters Redstreak – 150cc Scooters Roketa – 150cc Scooters, ATVs, Go Karts Scootstar – 150cc Scooters Schwinn – 150cc Scooters SSR – 150cc Scooters, ATVs, Go Karts SUNL – 150cc Scooters, ATVs, Go Karts Supermach – 150cc Scooters, ATVs Tank Sports – 150cc Scooters, ATVs TaoTao – 150cc Scooters, ATVs, Go Karts Trailmaster – 150cc Scooters Veloz – 150cc Scooters Verucci – 150cc Scooters, ATVs, Go Karts Vitacci – 150cc Scooters, ATVs, Go Karts Viva – 150cc Scooters, ATVs, Go Karts Wolf – 150cc Scooters Xingyue – 150cc Scooters ZNEN – 150cc Scooters Cylinder head Naraku – 160-180cc – GY6 125cc -150cc A replacement tuning cylinder head from NCY with larger valves and ports and an enlarged 61mm combustion chamber. This cylinder head fits on several NCY tuning cylinder kits (160cc-180cc) for the 125cc GY6 4-stroke scooter engines (scooters, quads and buggies). To further increase performance, a NCY sports camshaft with modified valve timing can also be installed. Tuning cylinder head with larger valves and larger channels as well as an enlarged 61mm combustion chamber. **