GY6 50 High Performance Parts
GY6 50 139 QMB High Performance Parts and Upgrades 49cc
139QMB/139QMA 49cc Scooter Engine High Performance and Stock PartsWhen upgrading your 139QMB GY6 49cc four stroke engine the four main areas to consider are engine, exhaust, fuel and air and trans. Build out from these and you will get results. If doing a clutch do roller weights and belt also, when doing cylinder kits with heads add exhaust, jets plus air filters.
48 Lower States Only