Blue Line Brake Sight Lens Replacement 18mm | GY6 139QMB
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Keep your brake fluid level visible and your system sealed with the Blue Line Brake Master Cylinder Sight Lens . This OEM-equivalent replacement lens fits the stock brake master cylinder on 139QMB and GY6-based scooters, and includes an o-ring gasket for a leak-free seal. Key Features OEM Equivalent: Direct-fit replacement for stock brake master cylinders on QMB and GY6 engines. Includes O-Ring Gasket: Everything needed for a complete, leak-free installation. Wide Compatibility: Fits 50cc through 169cc engines with QM or FM engine codes. Affordable Maintenance: Restore brake fluid visibility without replacing the entire master cylinder. Technical Specifications Lens Outer Diameter: 18mm Includes: Sight lens + o-ring gasket SKU: 1000-1378 Engine Compatibility 139QMB-based 50cc / 80cc engines: 139QMA 139QMB 1P39QMB 1P39QMA-2 YN139QMB JJ1P39QMB 139FMA-2 BD1P39QMB BN139QMB 147QMD Other QMA models Other QMB models 157QMJ-based 125cc / 150cc / 169cc engines: 157QMJ 161QMK 152QMI 1P61QMK YN1P57QMJ 1P52FMI 154FMI JJ157QMJ 1P57QMJ BN157QMJ BN161QMK-A Other QMJ, QMK, QMI models Tip: Don't see your engine listed? If your engine code includes "QM" or "FM", this lens is compatible with your vehicle. ?? California Prop 65 Warning
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