Blue Line 19mm CVK Carburetor - Accelerator Pump - 139QMB

This Blue Line 19mm CVK carburetor gives your compatible 139QMB scooter build improved airflow and responsive fuel delivery. Its larger-than-stock 19mm venturi supports airflow and fuel atomization, while the mechanical float-bowl accelerator pump supplies extra fuel during quick throttle openings to help reduce bogging and hesitation. The included electric choke and familiar CVK layout make it a practical performance upgrade for a properly matched, tuned setup.

Key Features

• 19mm venturi: Larger-than-stock bore supports improved airflow and fuel atomization.
• Mechanical accelerator pump: Float-bowl pump helps reduce hesitation when the throttle opens quickly.
• Electric choke included: Two-pin male plug-style connection for compatible cold-start enrichment wiring.
• CVK operation: Vacuum-operated slide and cable-operated throttle linkage.
• Supplied jetting: #85 main jet, #35 pilot jet and non-adjustable GY50 A4 needle provide a starting point for tuning.

Technical Specifications

• Brand: Blue Line
• Part number: 1100-1361
• Manufacturer reference: PD19J
• Classification: Aftermarket performance carburetor
• Carburetor type: CVK
• Venturi: 19mm
• Choke: Electric, two-pin male plug style
• Accelerator pump: Mechanical float-bowl type
• Airbox-side connection: 29mm inner diameter / 38mm outer diameter
• Engine-side connection: 19mm inner diameter / 28mm outer diameter
• Main jet: #85, PB style with 4mm thread
• Pilot jet: #35, CV style with 6mm thread
• Needle: Non-adjustable GY50 A4
• Country of origin: China

Compatibility

Engine code or brand alone does not establish a direct fit. Compare the 28mm engine-side outer diameter, 38mm airbox-side outer diameter, cable attachment and two-pin choke connection before ordering. Existing model applications require the matching carbureted configuration, particularly if the engine, intake or airbox has been modified. Final jetting and idle adjustment must suit your engine, intake and exhaust.

Replacement jets: Compatible PB-style main jets are available as JETKH1. Match the jet style and thread dimensions before purchase.

This product is intended for off-road use only. This product is not intended for use on public roads or land.

• 19mm venturi — larger than stock for improved airflow and fuel atomization
• Mechanical float-bowl accelerator pump helps reduce bogging and hesitation
• Electric choke (2-pin male plug) for easy cold starting
• #85 main jet and non-adjustable GY50 A4 needle pre-installed
• For matching 139QMB / 139QMA configurations; connection checks and final tuning required
• Intended for off-road use only; not for public roads or land

Brand: Blue Line; Part number: 1100-1361; Manufacturer reference: PD19J; Type: CVK aftermarket performance carburetor; Venturi: 19mm; Choke: electric two-pin male plug; Accelerator pump: mechanical float-bowl type; Airbox connection: ID 29mm / OD 38mm; Engine connection: ID 19mm / OD 28mm; Main jet: #85 PB style 4mm thread; Pilot jet: #35 CV style 6mm thread; Needle: non-adjustable GY50 A4; Origin: China; Use: off-road only, not public roads or land

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