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Dunstall Motorcycles
1969 Dunstall Norton Commando

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1969 Dunstall Norton Commando

Brief Specification

  • Norton 750 Engine
  • Bore 73mm, Stroke 89mm
  • Capacity 745cc
  • Hand finished and polished ports
  • Lightened and polished rockers
  • Special "H 18 S" material valves
  • Bronze "Hi-Dural 5" valve guides
  • Special dual rate valve springs
  • Finned induction manifolds
  • 10 to 1 compression, spun cast pistons
  • Lucas Capacitor ignition system
  • Lightened camfollowers
  • Street high lift camshaft
  • Paired Amal 932/901 type concentric carburettors
  • Flexible forced oil feed to rockers
  • Champion N6Y wide heat range plugs
  • Output 66 b.h.p at 7,000 rpm

Cycle Parts

  • Norton Commando frame, stove enamelled black
  • "Road-holder" forks fitted with external springs and gaiters
  • Twin 9" hydraulic disc brake.
  • G.T. fairing (choice of colours)
  • Balanced exhaust system
  • "Decibel" silencers
  • Rear mounted footrests and controls
  • 4 gallon capacity fuel tank (choice of colour)
  • Dunstal dual-seat incorporating mudguard, toolbox and number plate (choice of colours)
  • Glass-fibre front mudguard (choice of colour)
  • Clip-on handlebars with alloy control levers
  • Alloy fork top yoke
  • Polished alloy wheel rims
  • Avon G.P. rear tyre
  • Chromium plated chainguard
  • Alternative model available with twin leading shoe brake in place of the twin disk assembly
  • The following choice of colours are available:- red, yellow, racing green, silver or blue

Gearbox

Std 4 Speed
Semi Close Ratio
Alternative
Ratios
Gear Ratio Speed Gear Ratio Speed
Top 4.38 125 mph Top 4.84 115 mph
Third 5.35 103 mph Third 5.90 93 mph
Second 7.45 77 mph Second 8.25 67 mph
First 11.20 48 mph First 12.40 44 mph

www.woodgate.org/dunstall/69nor1.html / Webmaster / Revised 24th February 2000