Product Details
Description
Universal Parts Needle for QMB139 Carb- 5 Adj Settings
Replacement Part Details
Use this part when the original component is worn, damaged, missing, or no longer working correctly. Many scooter parts can look similar but use different sizes, plugs, brackets, thread patterns, or mounting styles, so careful comparison before purchase is recommended.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: QMB139
- Engine Code: QMB139
- Fitment Notes: Universal Fit
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit a QMB139 engine?
A: This SKU is listed as compatible with QMB139 engine-code fitment. Always compare your original part and scooter details before ordering.
Q: Is this for QMB139 scooters?
A: This SKU is listed with QMB139 engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 0.3 lbs |
|---|---|
| Dimensions | 4 × 4 × 1 in |
Replace a worn or damaged needle jet on your QMB139 50cc 4-stroke scooter with this Universal Parts Adjustable Needle Jet. This stainless steel needle jet features a tapered tip, cylindrical body, and 5 adjustment grooves for fine-tuning the air/fuel mixture across the throttle range. Includes a C-clip pre-installed in the middle (3rd) groove position. Raising the clip leans the mixture; lowering it richens it.
Technical Specifications
- Length: 38mm
- Clip Positions: 5 grooves
- Includes: C-clip (pre-installed, middle position)
- Material: Stainless steel
- Engine: QMB139 / 139QMB 50cc 4-stroke
Engine Compatibility
Fits QMB139-based 50cc / 80cc engines with the following engine codes:
| 139QMA | 139QMB | 1P39QMB | 1P39QMA-2 |
| YN139QMB | JJ1P39QMB | 139FMA-2 | BD1P39QMB |
| BN139QMB | 147QMD | Other QMA models | Other QMB models |
Don’t see your engine listed? If the engine code includes “QM” or “FM”, this needle jet is likely compatible with your carburetor.





