Starter Clutch Gear Assembly (Bendix) for 50cc QMB139 Go-Karts

Here is a starter clutch gear assembly (referred to as a Bendix at times) that can be used on a variety of go-kart models with the 50cc GY6 (QMB139) engines. If your go-kart uses a 50cc (or 49cc) gasoline engine, then it is probably a GY6 QMB139. If such is the case, then this is the correct replacement starter clutch for your kart.

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Center Shaft Diameter: 8 mm (5/16")
Starter Gear Diameter: 40 mm (1-9/16")
Total Starter Clutch Length: 70 mm (2-3/4")