Cvk Main Jet (# 135) for Scooters & Mopeds
ITEM# TT-26421
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Description
Cvk Main Jet (#135) for 139QMB and GY6 Scooters
This CVK main jet (#135) is made for 139QMB and GY6 scooters and works with a range of CVK carburetors that take a 5mm main jet. It plays a key role in controlling fuel flow, which affects engine performance and how well the scooter runs. You'll find it among our scooter carburetors & jets. Getting the jetting right can take some tuning, so look through available guides for step-by-step setup advice.
Build and Fit Details
The main jet uses a Keihin round design and has an M5x0.80 thread. It measures 8mm overall, which lets it seat securely in compatible carburetors. It works with several engine codes, so it suits a number of scooter models.
Signs It May Need Replacing
If your scooter accelerates sluggishly or the engine runs unevenly, it may be time to swap this main jet. Any changes made to your scooter or moped may also call for adjusting the jetting to keep performance where it should be.
Specifications
- Type: Main Jet
- Thread Size: M5x0.80
- Overall Length: 8mm
- Fits: 139QMB-based 50cc/80cc GY6 engines and 157QMJ-based 125cc/150cc/169cc GY6 engines with a 5mm main jet slot
Compatibility
Fits:
- 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD (50cc/80cc engines)
- Other QMA and QMB models (50cc/80cc engines)
- 157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ, BN161QMK-A (125cc/150cc/169cc engines)
- Other QMJ, QMK and QMI models (125cc/150cc/169cc engines)
How to choose: Compare the engine code on your engine with the codes listed above, or confirm that your carburetor has a 5mm main jet slot and that the engine code includes QM or FM.
Shop more: Scooter Carburetors & Jets · Scooter Parts
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