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.
California Prop 65 Warning: www.p65warnings.ca.gov
