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PJR engine components

one piece plasma nitrided stainless valve

6mm stem

  • 35mm inlet Jawa & GM
  • 34mm inlet Jawa & GM
  • 30mm exhaust Jawa & GM
  • 29mm exhaust Jawa

5mm stem

  • 35mm inlet Jawa & GM
  • 30mm exhaust Jawa & GM
  • 31mm exhaust Jawa & GM


a range of camshafts are available, cam specs are not published