139QMB / GY6 50cc Starter Motor

Reliable Ignition: OEM 139QMB, GY650 Starter Motor

Restore your scooter’s effortless push-button start with this Genuine Chinese 50cc Scooter Starter Motor. Specifically engineered for the 50cc QMB139 engine platform found, this high-torque electric motor is designed to provide consistent cranking power, even in cold weather. Whether you are dealing with a "clicking" starter, a dead spot in the armature, or a complete motor failure, this OEM replacement ensures your commute starts on the first try.

Technical Performance Features

• High-Torque Performance: Optimized internal windings deliver the necessary rotational force to overcome engine compression quickly, reducing strain on your battery.
• Weather-Sealed Housing: Features reinforced gaskets and a corrosion-resistant finish to protect internal components from road grime and moisture.
• Precision 10-Tooth Spline: Engineered for a perfect mechanical mesh with your starter bendix, preventing "grinding" and ensuring smooth engagement every time.
• Direct Plug-and-Play: Includes the factory-correct single-wire lead for a seamless connection to your existing starter relay harness.

Comprehensive Fitment Guide

This starter motor is a direct OEM replacement for Chicago Scooter Company models and related 50cc 4-stroke platforms:

Technical Specifications

• Voltage: 12V DC
• Spline Count: 10-Tooth
• Bolt Hole Spacing: 70mm (Center to Center)
• Connection: Single-Wire (Male Bullet Connector)

 Pro Tip: When installing, ensure the mounting surface is clean to provide a solid electrical ground through the engine case!

SKU: 1200-1115
Vendor: Chicago Scooter Company

Stock starter for GY50/139QMB