Crankshafts GY6 50 139QMB (6)

Genuine quality replacement crank for 50/90cc 4-stroke engines (GY6 50, 139QMB/QMA). The crank is pre-pressed with main bearings and connecting rod. GY6 engines are factory fitted with 2 different crank...

This crankshaft is a great alternative to replacing your faulty original crankshaft. It features a high-quality finish and balance, ensuring reliable operation at all engine speeds. The crankshaft is an...

Naraku produces tuning and racing parts for scooters and maxi scooters. Although its initial focus was on the popular GY6 engines, the brand now offers parts for all types of...

Shim for positioning the alternator rotor on the crankshaft. Length: 13mm, Width: 3mm, Height: 2.5mm. Shim for positioning the alternator rotor on the crankshaft. Length: 13mm, Width: 3mm, Height: 2.5mm.

The Jasil 22-tooth crankshaft for GY6 50cc 139QMB engines is designed to effectively replace the original crankshaft while offering excellent durability and high manufacturing precision. Featuring a 22-tooth gear, this...

The Naraku HD 16-tooth crankshaft for GY6 50cc engine is designed to replace the original crankshaft while offering superior strength for stock and high-performance engines. Thanks to its Heavy Duty...