Description
Main Jet (#136) for 139QMB and GY6 Scooters
This main jet is specifically designed for 139QMB and GY6 scooters, providing a necessary component for tuning engine performance. It is compatible with various vehicles utilizing a 5mm jet opening in a CVK carburetor. Proper jetting may require some testing to achieve the best results. This part is one of the key scooter carburetors & jets for ensuring efficient fuel delivery.
Performance Specifications
This part features a Keihin round-style main jet that has an overall length of 8mm and a thread size of M5x0.80. Manufactured to meet strict quality standards, it is a reliable component for maximizing your scooter's performance. Be sure to select the correct jet size based on your engine specifications.
Compatibility Overview
The main jet is suited for various engines with 50cc, 125cc, 150cc, and 169cc displacements. If your engine identification contains "QM" or "FM" and utilizes a 5mm jet opening in a CVK carburetor, this jet should fit your vehicle as well. Its compatibility across multiple models ensures widespread use.
Specifications
- Type: Keihin round-style main jet
- Thread Size: M5x0.80
- Overall Length: 8mm
Fitment
This main jet is suitable for engines based on the 139QMB and 157QMJ platforms. It fits a range of models, including:
- 139QMB-based engines: 139QMA, 1P39QMB, 1P39QMA-2
- 157QMJ-based engines: 161QMK, 152QMI, 1P61QMK
Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.
Shop more: Scooter Carburetors & Jets · Scooter Parts
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