Description
Main Jet #127 for 139QMB and GY6 Scooters
The main jet #127 is designed for use in 139QMB and GY6 scooters and mopeds, and can fit virtually any 5mm main jet slot in CVK carburetors. This part is important for optimizing the fuel delivery in your vehicle's engine. It is one of the key scooter carburetors & jets that can help improve performance. For best results, jetting may require some trial and error, so be sure to consult jetting instructions for guidance.
Construction and Specifications
This main jet features a Keihin round-style design, ensuring compatibility with various scooter models. The thread size is M5x0.80 with an overall length of 8mm. Its construction adheres to strict quality standards, making it a reliable choice for scooter enthusiasts.
Installation and Adjustment
Installing the main jet involves removing the existing jet and replacing it with this one. Ensuring a proper fit is important for good engine performance. Adjustments may be necessary to achieve the desired fuel mixture, which is a common practice when fine-tuning engine performance.
Specifications
- Type: Keihin round-style main jet
- Thread Size: M5x0.80
- Overall Length: 8mm
Fitment
This main jet is compatible with 139QMB-based 50cc / 80cc engines, as well as 157QMJ-based 125cc / 150cc / 169cc engines. Below are the specific engine codes it supports:
- 139QMB, 139QMA, 1P39QMB, 1P39QMA-2
- YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB
- BN139QMB, 147QMD, Other QMA and QMB models
- 157QMJ, 161QMK, 152QMI, 1P61QMK
- YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ
- 1P57QMJ, BN157QMJ, BN161QMK-A, Other QMJ, QMK, and QMI models
Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.
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