NCY #39 CVK Pilot Jet - Buddy / GY6 / 139QMB

This NCY #39 pilot jet helps you dial in idle and low-speed fueling on Genuine Buddy 125/150 scooters and compatible 139QMB and GY6 builds running a matching CVK or PWK carburetor. Whether you're sorting out low-speed response or tuning after other changes, this size gives you another step toward the right setup. Its elongated body has a slotted head, threaded mounting section and cross-drilled lower stem.

Key Features

• #39 pilot sizing: For tuning the carburetor's idle and low-speed fuel circuit, not the main-jet circuit.
• CVK/PWK application: For carburetors accepting this M6×0.75, 28mm pilot-jet pattern.
• Accessible adjustment: Slotted head allows installation and removal with a suitable screwdriver.
• Taiwan-made NCY part: Aftermarket jet for compatible carbureted scooter applications.

Technical Specifications

• Brand: NCY
• Part number: 1300-1052
• Manufacturer part number: 619N04CVK3039
• Original Parts For Scooters SKU: 114-38-39
• Part type: Pilot jet / idle jet / slow jet
• Jet size: #39
• Thread size: M6×0.75
• Overall length: 28mm
• Carburetor application: Matching CVK or PWK pilot-jet circuit
• Country of origin: Taiwan

Compatibility

Genuine Buddy 125 and Buddy 150; compatible carbureted Genuine Blur 150, SYM Fiddle 50/125, Symba, Mio 50 and HD 200 applications. Buddy 170i applications require a carburetor conversion using the matching jet pattern; this jet does not install in a fuel-injection system.

Match the carburetor, not just the engine code: QM/FM engine codes and model names identify potential applications, but the carburetor must accept this exact pilot-jet thread, length and profile. CVK and PWK carburetors are not universally interchangeable in jet fitment. The #39 size must also suit your engine's tuning requirements.

Jetting takes trial and error. See our carburetor jetting instructions for more information.

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

• #39 pilot jet for idle and low-speed fuel tuning
• M6×0.75 thread and 28mm overall length
• For matching CVK or PWK pilot-jet patterns
• Slotted head and cross-drilled lower stem
• Made in Taiwan

Brand: NCY; Part number: 1300-1052; MPN: 619N04CVK3039; Original Parts For Scooters SKU: 114-38-39; Type: Pilot / idle jet; Jet size: #39; Thread: M6×0.75; Overall length: 28mm; Application: Matching CVK / PWK pilot-jet circuit; Country of origin: Taiwan

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