50cc engine data sheet with 139 FMB-B box

Characteristics of the Chinese 50cc engine 139FMB-B

Chinese FMB-B times are more and more present in the box-type market. They are mostly used for motorcycles from Asia. These are sturdy 4 time engines that can be found on many brands. 139 FMB-B engine is present on 50cm4 motorcycles Eurocka Legend, Masai Black coffee and Scrambler, Mash Fifty, Orion Apollo Skyteam ace and Cobra. This engine is vertical, so it can easily be differentiated from 139FMB or others.

Chinese motorcycle engine 50cc model 139 FMB-B

The 139 FMB-B 50cm3 motor mounts on many models of 50cc with a Chinese-made box. We note the 50cc Eurocka motorbikes, Masai, Mash, Orion or Skyteam. In recent years, this type of motorcycle has been increasingly present in France, which is why 50Factory decided to offer a wide range of spare parts for this engine. Find below photos that help identify your 139FMB-B engine.

The 139FMB-B 50 Asian engine is a relatively large, vertical engine mounted on Chinese motorcycles.

Note especially on the engine 139FMB-B that the intake pipe is large enough. Above the connection of the carburettor.

This green plug on the Chinese 4 time engine 139FMB-B corresponds to the ignition of the machine.

This white socket on the 4max 139FMB-B 50cc engine is connected to the motorcycle regulator.

Spare parts for engine 139FMB-B

We offer a wide range of spare parts for your Chinese made 139FMB-B engine. Indeed you will find on our site parts like crankshafts, piston cylinders, exhausts, carburettors or even engine gaskets perfectly compatible with your motorcycle equipped with an engine type 139FMB-B 50cm3. Discover our entire range of spare parts, new or used below.

Engine inlet 139FMB-B 50