Universal Parts 20mm PD20J Carburetor 139QMB 50cc 4-stroke
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The Universal Parts PD20J is a Type-2 carburetor with a 20mm intake designed for 50cc 4-stroke 139QMB engines. It comes equipped with an electric choke and accelerator pump, making it the go-to upgrade for QMB139 scooters running a 70cc+ big bore kit or engines that came stock with larger displacement.
Key Features
- Electric choke (2-pin male plug)
- Accelerator pump for improved throttle response
- 20mm intake bore for increased airflow
- Main jet: #78 | Idle jet: #33
Specifications
- Inner Diameter (intake): 20mm
- Outer Diameter (air filter mount): 38mm
- Outer Diameter (intake side): 28mm
- Electric Choke plug: 2-pin, male
- Main Jet Size: #78
- Idle Jet Size: #33
Compatibility
Fits QMB139 50cc 4-stroke engines, including the following makes and models:
| Make | Model |
|---|---|
| Baja | SC50, SC50-P |
| Baotian | BT50QT-11 |
| Boss | 50cc QMB139 |
| CFMoto | 50cc QMB139 |
| Kymco | 50cc QMB139 |
| Lifan | 50cc QMB139 |
| Panterra | Freedom 50cc, Fusion 50cc, Retro 50cc |
| Qingqi | QM50QT-4G, QM50QT-6V |
| Schwinn | Hope 50, Laguna 50 |
| SUNL | 50cc QMB139 |
| Tank | 50cc QMB139 |
| Vento | 50cc QMB139 |
| Verucci | 50cc QMB139 |
| Wildfire | 50cc QMB139 |
| X-Treme | 50cc QMB139 |
| Various | Unlisted QMB139 makes/models |
Note: This carburetor is typically used on QMB139 engines with 70cc+ displacement or on scooters with a big bore kit installed.
This product is not intended for use on public roads or land.
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