Blue Line 139QMB CVK Carburetor Rebuild Kit | 18mm & 19mm

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)

Specifications

• Pilot Jet Size: 33
• Carburetor Fit: 18mm and 19mm CVK (PD18J / PD19J)
• Engine: 139QMB / GY50 50cc and 80cc 4-stroke
• SKU: 151-267 / 151-95

Compatibility

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.

• 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

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