Universal Parts Adjustable Needle Jet 5-Clip | QMB139 50cc

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:

Don’t see your engine listed? If the engine code includes “QM” or “FM”, this needle jet is likely compatible with your carburetor.

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

• 38mm stainless steel adjustable needle jet with tapered tip for precise fuel metering
• 5 adjustment grooves for fine-tuning air/fuel mixture — raise clip to lean, lower to richen
• C-clip included, pre-installed in middle (3rd) groove position
• Fits QMB139 / 139QMB 50cc 4-stroke carburetors and all QM/FM engine code variants
• Direct replacement for worn or damaged OEM needle jet

Length: 38mm | Clip Positions: 5 | Includes: C-clip | Material: Stainless steel | Type: Adjustable needle jet | Engine: QMB139 / 139QMB 50cc 4T

QMB139 / 139QMB 50cc 4-stroke engines: 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD, and other QMA/QMB variants. Any engine code containing QM or FM is likely compatible.