BLUE LINE
Blue Line Left Brake Switch - GY6 / 139QMB, 11-Inch
Expected back in stock: Nov 13, 2026
Description
This Blue Line left brake switch helps restore brake-light activation when you squeeze the left lever on a compatible CSC or GY6 / 139QMB scooter. Its two-wire lead, bullet terminals and 12 mm mounting barrel make it a practical replacement when the original switch stops responding, helping get your scooter ready for the next ride.
Key Features
- Left-lever application: Replacement switch for compatible left brake-lever assemblies.
- Two-wire connection: Attached leads terminate in two bullet terminals.
- 11-inch leads: Provides wiring reach to the scooter's matching harness connections.
- 12 mm mounting barrel: Match the original switch's mounting dimensions before installation.
- Blue Line aftermarket replacement: For the named CSC models and compatible GY6 / 139QMB applications.
Technical Specifications
- Brand: Blue Line
- Part number: 0800-1151
- Part type: Left brake switch
- Manufacturer type: Aftermarket
- Wiring: Two wires with bullet terminals
- Lead length: 11 inches
- Mounting barrel diameter: 12 mm
- Vehicle type: Scooter
Compatibility
- Chicago Scooter Company go
- Chicago Scooter Company go MAX
- Chicago Scooter Company Bella Classic 50
- Chicago Scooter Company Nitro Sport 50
- Chicago Scooter Company Pug 50
Also fits matching left-lever assemblies on Chinese GY6 50cc / 139QMB-based 50cc and 80cc scooters. Engine-platform references include 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD and other QMA/QMB applications.
Match the left-lever switch mount, 12 mm barrel, two-wire connections and switch operation before ordering. An engine code containing QM or FM does not by itself establish brake-switch compatibility.
Product Diagrams
Features
Specifications
Brand: Blue Line; Part number: 0800-1151; Type: left brake switch; Manufacturer type: aftermarket; Wiring: two wires with bullet terminals; Lead length: 11 inches; Mounting barrel diameter: 12 mm; Vehicle type: scooter; Fitment: matching left-lever mount, wiring and switch operation required
Model Fitments
Brands: Amstar, Amigo, Ascend, Baotian, Bashan, Blade, Boom, Chicago Scooter Company, Dongfang, Roketa, Baotian, Bashan, BMS, Cool Sports, E Ton, Fly Wing, Eagle, Fly, Italica, Riya, Ice Bear, Jackel, Jet Moto, JCL, Taotao, Peace, JM Star, Jonway, Kazuma, Keeway, KMD, Kymco, Lance, Lifan, Linhai, Loncin, Longbo, Fuxin, Jiajue, Tao Tao, Tao Motors, Trailmaster, Maxtrade, Meitien, Motofino, Motorino, NST, Panterra, Panther, Qlink, Yiben, Red Streak, Redcat, Roketa, Schwinn, Strada, SYM, Tank, Terminator ,Tomberlin, TNG, United Motors, Vento, Vitacci, Wildfire, Wolf, X-Treme, X-Pro, Yongfu, ZNEN, Zhongneng , Zhilong, Geely, Wangye, ZH and more Manufactured by: Taizhou Zhongneng Motorcycle Co.; Jiangsu Zhongneng Motorcycle Co.; Jiangsu Meijunte Technology Co.; Taizhou Qianxin Vehicle Co.; Ningbo Dongfang Lingyun Vehicle Made Co.; Taizhou Zhilong Technology Co.; Zhejiang Jiajue Motorcycle Manufacturing Co.; Zhejiang Gelly Ming Industrial Co.; Taizhou City Senglong Motorcycle Manufacture Co.; Jiangsu Sacin Motorcycle Co.; Jiangsu Linhai Power Machinery Group Co.; Zheijiang TaoTao Vehicles Co.; Zhejiang Senling Motorcycle Co.; Sanmen County Yongfu Machine Co; Taizhou Jiaojiang Zhiwei Motorcycle Manufacture Co.; Huzhou Daixi Zhenhua Technology Trade Co.; Taizhou Zhongneng Motorcycle Co.; Zhejiang Riya Motorcycle Co.; Ningbo Longjia Motorcycle Co.; Taizhou Zhongneng Motorcycle Co.; and more
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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.
