This is a aftermarket part and is seriously light compared to standard. It fits PK or PX
RESO Clutch Gear + Drive Sprocket Set Sport - 71/23 Teeth - Straight-Teeth - Lightened, Reinforced - Additional Lubricating Groove - For Powerful Simson Engines - M531 - M743
TRIUMPH T140 T150 T160 DRILLED LIGHTENED BRAKE DISC ROTOR 74-82 37-4275 37-7175
DJ-Motor Red 1" 25mm Bore with 1/4" Keyway Lightened Billet Aluminum Rear Wheel Hubs for Go Kart Drift Trike
Race Engine Kit - YX140 Z40 cam with lightened flywheel & Stator
Lambretta CDI unit (for lightened flywheels/high revving engines AF Rayspeed
Lightened Flywheel
