Product Details
49cc CrankshaftFor GY6-50 QMB139 49-80cc Scooter Motors from ScootsUSA. Designed for 49cc/50cc/80cc, GY6, QMB139 engines. Fits Tomos, Tomos Nitro, Tomos, Scooters. Compare the specifications below with your original part to confirm fitment before ordering.
Specifications
- Thread: M10x11.5
- Thread: M12x15
- Size: 17th
- Size: 16th
- Size: 247mm
- Size: 5mm
- Size: 42mm
Compatibility / Fitment
Use the fitment details below to confirm this part matches your vehicle before ordering.
- Engine Size: 49cc/50cc/80cc, GY6, QMB139
- Fits Models / Common Applications: Tomos, Tomos Nitro, Tomos, Scooters
- Fitment Notes: Engine, Crankshafts
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible vehicle. If your vehicle has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit my 49cc/50cc/80cc engine?
A: This part is listed for 49cc/50cc/80cc, GY6, QMB139 applications. Verify your engine code and the specifications above before ordering.
Q: How do I confirm this matches my original part?
A: Measure your original part and compare against the listed specs (Thread: M10x11.5; Thread: M12x15; Size: 17th; Size: 16th; Size: 247mm; Size: 5mm; Size: 42mm). Matching measurements is the most reliable way to confirm fitment.






