Restore your clogged or worn CVK carburetor with this complete rebuild kit for 139QMB (GY50) 50cc and 80cc scooters. Fits 18mm and 19mm CVK constant-velocity carburetors — commonly the PD18J or PD19J models found on virtually all 139QMB-based Chinese scooters. The kit includes every internal wear item needed for a full rebuild: float, needle seat, main jet, pilot jet, needle jet, mixture screw with spring and o-ring, e-clip, flat washer, and float bowl gasket.
Kit Contents
- White plastic float with hinge arm
- Float needle (needle seat)
- Main jet (brass hex body)
- Pilot / idle jet (small brass)
- Needle jet (silver tapered)
- Mixture screw with spring and o-ring
- E-clip
- Flat washer
- Float bowl gasket (rectangular rubber)
Features
- Complete Rebuild Kit for 18mm and 19mm CVK Carburetors (PD18J/PD19J)
- Includes Float Float Needle Main Jet Pilot Jet Needle Jet and Mixture Screw
- Includes Float Bowl Gasket E-Clip Flat Washer O-Ring and Spring
- Pilot Jet Size 33
- Fits 139QMB GY50 50cc and 80cc 4-Stroke Engines
- Compatible with Virtually All Chinese 50cc Scooters Using 139QMB Engine
Specifications
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Pilot Jet Size: 33
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Carburetor Fit: 18mm and 19mm CVK (PD18J / PD19J)
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Engine: 139QMB / GY50 50cc and 80cc 4-stroke
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SKU: 151-267 / 151-95
Model Fitment
Fits 139QMB-based 50cc and 80cc engines with 18mm or 19mm CVK carburetors (PD18J or PD19J). Compatible with the vast majority of Chinese-manufactured 50cc scooters — see brand and model list in product details. Verify your carburetor bore size (18mm or 19mm) before ordering.
