You-All
You-All CVK PD18J Carburetor w/ Accelerator Pump 4T 50cc
Description
Eliminate hesitation and restore consistent power to your 50cc scooter with the You-All 18mm CVK Carburetor (PD18J) — our #1 selling carburetor. Engineered to outperform standard OEM replacements, this unit combines a larger venturi with a mechanical accelerator pump for crisp throttle response and a rock-solid idle on daily commuters and performance builds alike.
Key Features
- Mechanical Accelerator Pump: Dedicated fuel-squirt circuit eliminates "bogging" and hesitation during rapid throttle transitions.
- High-Flow Venturi: Larger-than-stock venturi increases airflow and fuel atomization for improved power delivery.
- Black-Top CVK Dome: Improved idle circuit delivers a superior, stable idle — eliminating the surging and stalling common on OEM 50cc carburetors.
- Precision Jetting: Pre-installed with a #81 Main Jet and #33 Idle Jet, calibrated for immediate bolt-on performance on most 50cc–80cc engines.
Specifications
- Model: PD18J (CVK Type)
- Intake Bore: 18mm
- Air Filter Mount (OD): 40mm
- Main Jet: #81 | Idle Jet: #33
- Brand: You-All
Fitment Guide
Direct OEM replacement for 139QMB / GY6 50cc engines. Compatible with:
| Brand | Compatible Models |
|---|---|
| Chicago Scooter Co. | go., go. Max, Bella, 50, Nitro Sport |
| Wolf Brand Scooters | RX-50, Islander, Rugby, Blaze, Lucky, Jet |
| Lance Powersports | Cali Classic 50, Cabo 50, PCH 50 |
| Honda | Ruckus / Metropolitan (select 50cc carb models) |
| 139QMB / GY6 50cc | All 139QMB/GY6-powered 50cc scooters, ATVs, and quads with PD18J carburetors |
Tip: If your 4-Stroke 49/50cc engine code includes "QM" or "FM", this carburetor is compatible with your vehicle.
About You-All
You-All is a trusted OEM and aftermarket supplier specializing in GY6 and QMB139 engine components. Their carburetors are widely used by scooter dealers and enthusiasts across North America for reliable, cost-effective performance.
Mechanic's Notes: After installation, ensure your throttle cable has a small amount of freeplay so the accelerator pump can fully reset between throttle inputs. Before installing, fit a new fuel filter and drain old fuel from the tank to prevent jet clogging.
This product is intended for off-road use only and is not intended for use on public roads or land.
Product Diagrams
Model Fitments
Brands: Amstar, Amigo, Ascend, Baotian, Bashan, Blade, Boom, Chicago Scooter Company, Dongfang, Roketa, Baotian, Bashan, BMS, Cool Sports, E Ton, Fly Wing, Eagle, Fly, Italica, Riya, Ice Bear, Jackel, Jet Moto, JCL, Taotao, Peace, JM Star, Jonway, Kazuma, Keeway, KMD, Kymco, Lance, Lifan, Linhai, Loncin, Longbo, Fuxin, Jiajue, Tao Tao, Tao Motors, Trailmaster, Maxtrade, Meitien, Motofino, Motorino, NST, Panterra, Panther, Qlink, Yiben, Red Streak, Redcat, Roketa, Schwinn, Strada, SYM, Tank, Terminator ,Tomberlin, TNG, United Motors, Vento, Vitacci, Wildfire, Wolf, X-Treme, X-Pro, Yongfu, ZNEN, Zhongneng , Zhilong, Geely, Wangye, ZH and more Manufactured by: Taizhou Zhongneng Motorcycle Co.; Jiangsu Zhongneng Motorcycle Co.; Jiangsu Meijunte Technology Co.; Taizhou Qianxin Vehicle Co.; Ningbo Dongfang Lingyun Vehicle Made Co.; Taizhou Zhilong Technology Co.; Zhejiang Jiajue Motorcycle Manufacturing Co.; Zhejiang Gelly Ming Industrial Co.; Taizhou City Senglong Motorcycle Manufacture Co.; Jiangsu Sacin Motorcycle Co.; Jiangsu Linhai Power Machinery Group Co.; Zheijiang TaoTao Vehicles Co.; Zhejiang Senling Motorcycle Co.; Sanmen County Yongfu Machine Co; Taizhou Jiaojiang Zhiwei Motorcycle Manufacture Co.; Huzhou Daixi Zhenhua Technology Trade Co.; Taizhou Zhongneng Motorcycle Co.; Zhejiang Riya Motorcycle Co.; Ningbo Longjia Motorcycle Co.; Taizhou Zhongneng Motorcycle Co.; and more
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
