Moturo carburetor for 139QMB QMA GY6 50cc

Moturo Carburetor for 139QMB and 139QMA GY6 50cc 4T Scooters

The Moturo carburetor for 139QMB and 139QMA GY6 50cc engines in 4T scooters (Baotian and identical import scooters) — the first point of call for starting problems, poor idling, or excessive fuel consumption. 85 main jet, electric choke, ready for installation.

The carburetor regulates fuel and air in the intake tract before the cylinder. Main jet 85 (5 mm), pilot jet 33, intake manifold connection diameter 28 mm, air filter connection diameter 38 mm. Carburetor cover, slide, and needle are improved compared to the standard version.

Replacement takes about an hour with a screwdriver, a socket wrench set, and pliers for the hose clamps.

Carburetor for GY6 50cc engines, made by Moturo.

Performance · Material · Specifications

• Main jet 85 (5 mm), pilot jet 33
• Intake manifold connection 28 mm, air filter 38 mm
• Electric cold-start device (choke) pre-installed
• Metal cover, revised slide and needle

Important notes – please read

Original replacement part design, no separate ABE required. Before installation, compare connection dimensions (intake manifold 28 mm, air filter 38 mm) with the old carburetor; some import scooters deviate depending on the production series and previous owner modifications.

Tools & time required

• Screwdriver for the hose clamps
• Socket wrench set for the mounting screws
• About an hour for an experienced mechanic

Scope of delivery

1 × carburetor with metal cover and electric choke (ready for installation, with 85 main jet). Not included: intake manifold, air filter, throttle cable, connector for the choke, tools.

Frequently asked questions

Does the carburetor also fit 50cc two-stroke engines?
No, only for the four-stroke engines of the 139QMB and 139QMA series.

Do I need a TÜV registration?
No. Original replacement part design with factory hole pattern.

Do I need to check anything before installation?
Compare the intake manifold 28 mm and air filter 38 mm with your old part; some import scooters deviate.