Vintage Kart Ignition Rotor Flywheel 12.3mm / 16.2mm

Vintage kart flywheel.  Tested on a Yamaha KT-100 taper and seems to fit, but there are no brand markings.  Rotation direction is not marked, has three evenly spaced magnets, with the keyway aligning to the gap between two of the magnets.  

Dimensions:

• Center hole I.D.:  Tapered, ~12.3mm at outside & ~16.2mm at inside
  
  
• Keyway:  3mm
  
  
• O.D.:  ~60mm
  
  
• Width:  ~20.72mm