Crankshaft GY6 Engine 50cc – 139QMB | For Chinese Retro Scooters

Original crankshaft with 22-tooth oil pump gear

Is your scooter’s crankshaft worn or faulty? This crankshaft for GY6 50cc engines (139QMB) restores smooth, reliable running. It has a 22-tooth oil pump gear on the right-hand side and comes with a shaft key.

This crankshaft fits almost all Chinese retro scooters with GY6 / 139QMB engine block (10 inch wheels), including popular Vespa-look models.

Suitable for:

• Fosti

• AGM VX50 & Retro

• Rover

• Motormania

• Benzhou

• Yiying

• Boatian

• ZNEN

• La Souris

• Grande Retro, Pico, Bella 50

• Killerbee

• Santini

• Peugeot (GY6 variants)

• Kymco (GY6 variants)

• And many other scooters with 139QMB / GY6 engines

Characteristics:

• Type: Crankshaft 50cc (GY6 / 139QMB)

• Application: For 4-stroke GY6 engine block (10”)

• Gear: 22 teeth (oil pump drive, right side)

• Includes: Shaft key for installation

• Fit: Original, straight fit

Benefits:

• Strong construction – Reliable and durable

• Original fit – Fits 139QMB / GY6 engines without modifications

• Complete – Includes a shaft key for installation

• Suitable for many retro scooters – Widely applicable to Chinese Vespa-look models

Note:

Always check whether your current crankshaft is also equipped with a 22-tooth sprocket for the oil pump before ordering. Newer models often feature this configuration.

📦 Immediately available at China Scooter Onderdelen
✅ Suitable for GY6 / 139QMB engine blocks (50cc)
✅ With 22-tooth oil pump drive
✅ Shaft key included
✅ Competitive prices & fast delivery

Give your scooter a new lease of life and avoid costly repairs with this GY6 50cc crankshaft (139QMB).