Possible spark plugs:

  • NGK: DPR8Z
  • Autolite: 4163
  • Denso: X24GPR-U

Details about your spark plug:

  • Type: MTCYC.
  • Thread size: 12mm (0.47244 inches)
  • Hex size: 18MM inches (457.2 mm)
  • Reach: 21MM inches (533.4 mm)
  • Seat type: GASKET
  • Projected tip: YES

Convert another spark plug:

spark plug converter: