CSC 8-Magnet Flywheel - go. & 139QMB Scooters

This Chicago Scooter Company eight-magnet flywheel is a replacement rotor for CSC go., Genuine Bella Classic 50, Pug 50, Nitro Sport 50, and compatible 139QMB-based scooters. Get your scooter's electrical system back in working order with a stock-replacement flywheel that works with the matching stator. Factory balanced for smooth rotation, it features a metal rotor body, a keyed center mounting bore, and a 110mm outer diameter. The stator is sold separately.

Key Features

• Factory balanced: Balanced for smooth rotation.
• Stock-replacement application: Replaces the flywheel on the compatible scooters below.
• Eight-magnet design: Works with the matching stator in your scooter's electrical system.
• Keyed mounting bore: Features a cut-out keyway for alignment on the crankshaft.
• Defined fit-check dimensions: 90mm inner diameter and 110mm outer diameter help you compare against the original rotor.
• Flywheel only: Stator is not included.

Technical Specifications

• Brand: Chicago Scooter Company (CSC)
• Part number: 0900-4000
• Manufacturer part number: 3131003
• Original Parts For Scooters reference: 151-138
• Part type: Flywheel / magneto rotor
• Balance: Factory balanced
• Magnet count: 8
• Inner diameter: 90mm
• Outer diameter: 110mm
• Thread size: M24x1.00
• Mounting bore: Keyed
• Stator: Not included

Compatibility

Check the engine code stamped on your scooter before ordering. Engines marked with a listed code may use this flywheel, but verify the 90mm inner diameter, 110mm outer diameter, M24x1.00 thread, keyed mounting bore, and stator configuration against the original part. A code containing “QM” or “FM” alone is not enough to confirm fitment.

• Factory balanced for smooth rotation
• Eight-magnet replacement flywheel / magneto rotor
• Keyed center mounting bore
• 90mm inner diameter and 110mm outer diameter
• M24x1.00 thread
• Fits specified CSC go. and Genuine 50cc applications; stator not included

Brand: Chicago Scooter Company (CSC); Part number: 0900-4000; MPN: 3131003; Original Parts For Scooters reference: 151-138; Type: flywheel / magneto rotor; Balance: factory balanced; Magnets: 8; Inner diameter: 90mm; Outer diameter: 110mm; Thread: M24x1.00; Mounting bore: keyed; Stator: not included

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