GY6 50cc (139QMB) CVK Carburetor Rebuild Kit for 18mm & 19mm

CVK Carburetor Rebuild Kit for GY6 50cc Scooters

This repair kit is built to bring back proper operation to a CVK carburetor used on 139QMB engines, which are common in 50cc and 80cc scooters. It works with both 18mm and 19mm CVK units, covering the PD18J and PD19J models. If your scooter is struggling because of clogged or worn parts, this kit is one of the GY6 50cc scooter parts you can use to address the problem.

What Comes in the Kit

Everything needed for a full internal rebuild is included. The contents are a white plastic float with a hinge arm, a float needle, a main jet, a pilot jet, a needle jet, a mixture screw with its spring and o-ring, an e-clip, a flat washer, and a float bowl gasket. These pieces are meant to swap out worn or damaged originals so the carburetor can work as intended.

Fitting and Use

Installing these parts in your CVK carburetor can noticeably improve how your scooter runs. The job suits home mechanics with basic tool skills. Before buying, check whether your carburetor measures 18mm or 19mm at the bore so you get the right match.

Specifications

• Carburetor Fit: 18mm and 19mm CVK (PD18J / PD19J)
• Engine: 139QMB / GY50 50cc and 80cc 4-stroke
• Pilot Jet Size: 33
• Fits: 139QMB / GY50 50cc and 80cc 4-stroke engines with 18mm or 19mm CVK carburetors (PD18J or PD19J)

Compatibility

Fits:

• 139QMB / GY50 50cc and 80cc 4-stroke engines (18mm or 19mm CVK, PD18J or PD19J)

How to choose: Check your carburetor bore, which will be either 18mm or 19mm. Pair it with the PD18J or PD19J carburetor noted on this kit.

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