ScootsUSA Select – 100cc (High Performance) Cylinder Piston Top End Kit for GY6-50 QMB139 Chinese Scooter Motors. Bore 50mmRequires Head #634585

Compatibility / Fitment

Use the fitment details below to confirm this part matches your vehicle before ordering.

• Engine Size: 100cc, GY6, QMB139
• Fits Models / Common Applications: Chinese Scooters, Scooters
• Fitment Notes: Engine, Cylinders & Big Bore Kits

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 100cc engine?

A: This part is listed for 100cc, GY6, QMB139 applications. Verify your engine code and the specifications above before ordering.

Q: Which models does this fit?

A: Common applications include Chinese Scooters, Scooters. Other compatible models may exist — confirm by comparing photos and measurements.