Universal Parts
Description
Stop chasing your idle. This Universal Parts Carburetor Idle Screw Spring is the small compression spring that holds your air/fuel mixture screw in position against engine vibration. When this spring weakens or corrodes, the idle screw creeps out of adjustment, causing stalling, surging, and constant re-tuning. At $1.40 it's one of the easiest fixes on a QMB139-carbureted scooter.
Key Features
- Precision Tension: Engineered to hold screw position under high-RPM vibration without over-tensioning.
- Zinc-Plated Finish: Corrosion-resistant coating prevents binding inside the carburetor body.
- Correct 10mm Length: Sized specifically for QMB139 and GY6 50cc carburetor idle/air screw ports.
- Broad Compatibility: Fits most Chinese 50cc 4-stroke scooter carburetors.
Specifications
- SKU: 151-199
- Length: ~10mm
- Material: Zinc-plated steel
- Application: Carburetor idle / air adjustment screw return spring
- Engine Type: 50cc 4-stroke (QMB139 / GY6)
Compatibility
| Brand | Popular Models |
|---|---|
| Generic GY6 / QMB139 | All 50cc 4-stroke QMB139 carbureted engines |
| Baja | SC50, BE50 |
| Kymco | Agility 50, People 50 |
| TaoTao / Bintelli / Peace / Roketa | Most 50cc 4-stroke scooter models |
| Genuine Buddy 50 / RoughHouse 50 | QMB139-carbureted variants |
Product Diagrams
Features
Specifications
SKU: 151-199 | Length: ~10mm | Material: Zinc-plated steel | Application: Carburetor idle/air adjustment screw return spring | Engine: 50cc 4-stroke QMB139 / GY6
Model Fitments
All 50cc 4-stroke QMB139 and GY6 carbureted engines | Genuine Buddy 50, RoughHouse 50 | Kymco Agility 50, People 50 | Baja SC50, BE50 | Most Chinese 50cc scooters (TaoTao, Bintelli, Peace, Roketa, and others)
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
