This rebuild kit includes: 1x Racing ignition coil + 1 x 5 Pins AC CDI + 1 x Spark Plug + 1 x 39mm Air Filter.39mm Air Filter fits for 50cc 110cc 125cc 150cc GY6 moped scooter ATV dirt bike motorcycle. High performance racing ignition coil for gy6 scooter go kart 50cc 125cc 150cc, GY6 139QMB 152QMI 157QMJ engines, fits atv, mopeds and go karts.Also Fits Honda TRX200 TRX200D TRX200SX TRX250;Honda Sportrax 300EX ATV (1993-2006) / TRX300, 300FW;Honda Fourtrax 300 ATV (1988-1992) / TRX350 (1986-1987);Honda TRX400FW (1995-2003) TRX450FM (2002-2004).This Ignition Coil fits most of the Chinese Brands such as TaoTao, Buyang, Sunl, Roketa, Lifan, Aim-EX, Kazuma, Coolsports etc. 5 Pins AC CDI Fits: GY6 50cc-150cc 4-stroke engines Scooters, ATVs, Go Karts, Quads, Mopeds and other Bikes.Also fits Honda XR50 CRF50 50cc 110cc 125cc Pit Dirt Bikes. Racing 3 Electrode Spark Plug.Mainly for gy6 scooter moped atv dirt bike 50cc 110cc 125cc 150cc engine. This item will fit almost all Chinese bran