Application: GY6 50/125/150cc, 139QMB/QMA engines, Yamaha ZY100, Honda DIO, Kymco Heroism and most Chinese 4-stroke scooters.

Clutch Pressure Plate Set

Outer Diameter: 90-100mm (GY6 standard size)

Center Square Bore: 14/16/18mm (optional for different drive shafts)

Mounting Holes: 6-8 positions, for clutch shoe alignment

Finish: High-temperature powder coating, anti-rust

Color Code: Red/White/Green for different preload levels (OEM/Racing/Track)

Spring Set

Clutch Return Springs (3pcs):

Material: High-carbon manganese steel

Tension: 1000N/1500N/2000N (optional)

Free Length: 20-25mm, Stroke: 8-10mm

Clutch Center Spring (3 types):

Material: Chrome-vanadium steel

Wire Diameter: 2.0-2.5mm, Coils: 7-8

Preload RPM: 1000/1500/2000rpm (different engagement speeds)

Fit Shaft Diameter: 14/16/18mm