Description
Restore reliable fuel flow with this vacuum-operated replacement fuel petcock. Designed for scooters with gas tanks mounted high in the tail section, this petcock uses engine vacuum to open the fuel valve automatically when the engine is running — and closes it when the engine stops, preventing fuel from flooding the carburetor. Fits the M14x1.00 coarse-thread tank fitting used across CSC models and the broad GY6 / QMB139 Chinese scooter platform.
Features
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Vacuum-Operated (Automatic): Opens with engine vacuum, closes at rest — no manual ON/OFF/RES lever required.
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M14x1.00 Thread: Correct coarse-thread fitting for high-mounted tail-section fuel tanks on GY6 and QMB139 platforms.
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5mm Fuel Outlet Barb: Standard barb size for OEM fuel line connections on listed scooters.
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Integrated Filter Tube: Clear 62mm filter tube screens debris before it reaches the carb.
Compatible Models
- CSC go. and go. MAX
- CSC Bella Classic 50
- CSC Nitro Sport 50
- CSC Pug 50
- GY6 125cc / 150cc scooters (157QMJ-based) with vacuum petcock
- QMB139 / 139QMB 50cc scooters with vacuum petcock
Specifications
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Thread Size: M14 x 1.00 (coarse)
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Nut Inner Diameter: 13mm
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Fuel Outlet Diameter: 5mm
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Filter Tube Length: 62mm
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Operation: Vacuum-operated automatic petcock
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Manufacturer: Prima / OEM | SKU: 129-25 / 164-93
Important: Compare your existing petcock to the image before ordering This petcock does not fit Genuine Scooter Company models, which use a different thread pitch.
Model Fitment
CSC go., go. MAX, Bella Classic 50, Nitro Sport 50, Pug 50; GY6 125/150cc (157QMJ) and QMB139 50cc Chinese scooters with vacuum-operated petcock and M14x1.00 tank thread
Product Diagrams
