Complete replacement engine for 50cc Euro4 GY6 4-stroke engines 139QMB/QMA with long engine block, long gearbox output shaft and rear drum brake. A 729mm V-belt is required for the long engine block. The engine length can be determined by the distance between the crankshaft (variator) and the transmission input shaft (clutch bell housing). The engine is supplied complete with drive, alternator etc. and is ready to install.
There may be deviations in the transmission output shaft. There are two variants: Engine with short or long output shaft (the shaft on which the rear wheel is mounted). The short output shaft is used on vehicles with one rear shock absorber, the long shaft on vehicles with two rear shock absorbers. If the short shaft is required, it can easily be taken from the original engine.
There may be deviations in the transmission output shaft. There are two variants: Engine with short or long output shaft (the shaft on which the rear wheel is mounted). The short output shaft is used on vehicles with one rear shock absorber, the long shaft on vehicles with two rear shock absorbers. If the short shaft is required, it can easily be taken from the original engine.
