OEM 681-17.7-32 CVT Drive Belt - 139QMB/GY6 50cc Scooters

Bring smooth, dependable power delivery back to your daily ride with the Chicago Scooter Company 681 × 17.7 × 32° CVT Drive Belt. This OEM replacement serves the listed CSC 50cc scooters and compatible short-case 139QMB/GY6-based setups that require this belt size. High-tensile synthetic rubber resists stretching, edge-fraying and heat from stop-and-go riding, making it a practical refresh for a worn belt.

Key Features

• CSC OEM Replacement: Direct replacement for the listed original CSC belt configurations.
• Smooth Power Transfer: Correct belt sizing supports consistent CVT operation.
• Daily-Ride Durability: High-tensile synthetic rubber resists stretching, edge-fraying and heat.
• Exact Size Reference: 681mm length, 17.7mm width and 32° angle.
• Cogged Inner Profile: Notched underside suits the belt's CVT pulley path.

Technical Specifications

• Brand: Chicago Scooter Company (CSC)
• Part number: 1200-4002
• Manufacturer reference: 3072004
• Belt size: 681 × 17.7 × 32°
• Material: High-density synthetic rubber
• Application: Matching short-case 50cc / 139QMB-based CVTs
• Country of origin: China
• Quantity: One drive belt

Compatibility -  139QMB-B CVT Transmissions

Also fits matching 139QMB-B based 50cc/80cc short-case setups, including associated codes 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB and 139FMA-2, when the CVT requires a 681 × 17.7 × 32° belt.

Compatible applications include matching scooters from Amstar, Baotian, Bashan, BMS, Chicago Scooter Company, Dongfang, E-Ton, Ice Bear, Jonway, Keeway, Kymco, Lance, Lifan, Linhai, Loncin, Motorino, Roketa, SYM, TaoTao, Vento, Vitacci, Wolf, X-Pro and ZNEN. These are configuration-dependent applications, not a guarantee for every scooter from each brand.

Before ordering: Read the size printed on your existing belt and verify the vehicle's specified belt dimensions. 

• CSC OEM replacement for listed original belt configurations
• High-tensile synthetic rubber resists stretching, edge-fraying and heat
• 681mm length x 17.7mm width x 32° angle
• Compatible with dimension-matched short-case 139QMB/GY6-based CVTs
• Cogged inner profile

Brand: Chicago Scooter Company; Part number: 1200-4002; Manufacturer reference: 3072004; Length: 681mm; Width: 17.7mm; Angle: 32°; Material: high-density synthetic rubber; Profile: cogged; Origin: China; Quantity: one belt

CSC go., go MAX, Pug 50, Bella Classic 50 and Nitro Sport 50 with matching 681 x 17.7 x 32° belt specification. Associated codes: 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 147QMD, BN139QMB, 139FMA-2, BD1P39QMB. Also dimension-matched 139QMB-based 50cc/80cc short-case scooters from Amstar, Baotian, Bashan, BMS, Dongfang, E-Ton, Ice Bear, Jonway, Keeway, Kymco, Lance, Lifan, Linhai, Loncin, Motorino, Roketa, SYM, TaoTao, Vento, Vitacci, Wolf, X-Pro and ZNEN. Verify belt print and specified dimensions; engine code alone does not establish fit.