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Norton Commando Black Diamond Exhaust Valve 1.30"

Norton Commando Black Diamond Exhaust Valve 1.30" MAP9198

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  • Norton Commando Black Diamond Exhaust Valve 1.30" MAP9198
Norton Commando Black Diamond Exhaust Valve 1.30"
MAP Cycle has 16 left in stock
MAP Cycle has 16 left in stock
$26.95
This high performance, standard sized (1.30"), exhaust valve is built using MAP's race-proven, Black Diamond technique. These hard-coated stainless steel valves are far superior to stock valves. Fits 1969 and later Norton Commando models. Additional information below.


$26.95

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Description

Details

Race-proven durability!

Our MAP valves feature black oxide nitrating (a superior hardening process) which penetrates into the ultra-EV8 stainless steel core material, forming a super-hard outer layer. This "Black Diamond" finish adds surface hardness as well as a smoother exterior coating which greatly reduces friction. This reduction in friction allows for tighter tolerances (fit) and provides long-lasting durability.

  • These valves are vastly superior to factory valves and other so-called "performance" finishes such as hard chrome.
  • Our induction welded, heat-treated tip prevents mushrooming and eliminates the need for lash caps.

Oversized Valves Are Available From MAP Cycles, Inc.

  • Our oversized valves (OS) are flow tested for maximum performance.
  • Oversized valves can also be used to rejuvenate sunken valve seats while correcting valve geometry.
  • The OS valve features relocated keeper locations to accommodate hi-lift racing cams and springs. This saves additional machining expense.

NOTE: Always be sure to check piston clearance before installing oversize valves.

FITS:

  • 1969 and later Norton Commando models.

Additional Information

SKU MAP9198
Manufacture MAP Cycle
Additional Information

Additional Information

SKU MAP9198
Manufacture MAP Cycle
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Fitment Information

Norton Models

  • Norton Commando 750R 1969 - 1970
  • Norton Commando Fastback 750 1969 - 1973
  • Norton Commando Fastback 850 1973
  • Norton Commando Fastback LR 750 1971 - 1973
  • Norton Commando Hi-Rider 750 1971 - 1975
  • Norton Commando Hi-Rider 850 1973 - 1974
  • Norton Commando Interstate 750 1972 - 1973
  • Norton Commando Interstate 850 1973 - 1974
  • Norton Commando Interstate Combat 50 1972
  • Norton Commando John Player 850 1973 - 1975
  • Norton Commando MK III Hi-Rider 850 1975
  • Norton Commando MK III Interstate 850 1975 - 1977
  • Norton Commando MK III Roadster 850 1975 - 1977
  • Norton Commando Roadster 750 1971 - 1973
  • Norton Commando Roadster 850 1973 - 1974
  • Norton Commando Roadster Combat 750 1972
  • Norton Commando Scrambler 750 1971
  • Norton Commando Scrambler 750S 1969 - 1970
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