Performance head cylinder 90cc 50mm for GY6 engine, baotian Sym Orbit This Head cylinder will fit most 4 stoke 50cc horizontal style (139QMB) Scooter, Moped, ATV 4-stroke air-cooled engines / motors that are being made and imported from Asia, China, Taiwan, Japan, Korea, etc. like kymco agility , baotian This kit will fit : BAOTIAN BT49QT-2 BAOTIAN BT49QT-7 BAOTIAN BT49QT-9 BAOTIAN BT50QT-9 BAOTIAN BT50QT-11 BAOTIAN Ecobike BENZHOU YY50QT BENZHOU City Star 50 BUFFALO Wind ERING Sprint 50 JIN LUN JL50QT KARCHER KM 50 Kreidler Flory 50 Kymco Agility 50 Kymco Agility MMC 50 Kymco Filly 50 Kymco Vitality 50 KYMCO Filly KYMCO Nexxon 50 KYMCO People KYMCO Super 8 KYMCO Vivality KYMCO NEW DINK 50 KYMCO Yager KYMCO Yager GT MSK Ecobike 50 PEUGEOT V-CLick REX Capriolo 50 REX Flory REX RS 450 REX RS 500 REX Off Limit 45 RIEJU Paseo 50 RIEJU Toreo 50 Sachs 49er 50 Sachs Bee SANILI TS50QT-4 QUINGQI QM50QT-6A XINLING ZHONG YU 50 QT-5 ZHONG YU 50 QT-7 ZHONG YU ZY 50QT ZHONGSHEN Wind 25/50 ZHONGSHEN ZS50QT-4 50