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Dunstall Motorcycles
1969 Dunstall Norton Sprint

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1969 Dunstall Norton Sprint

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

  • Duplex "Featherbed" frame, crome plated
  • "Road-holder" forks fitted with twin leading shoe brake
  • Balanced exhuast system, or upswept, one side system
  • "Decibel" silencers
  • Rear footrest kit, or forward footrests with upswept pipes
  • 3½ gallon lowline, 4 gallon or 5 gallon tank (choice of colours)
  • G.T. dual-seat incorporating mudguard, toolbox and number plate (choice of colours)
  • Chrome headlamp assembly
  • Chrome dual instrument bracket
  • Manx front mudguard, or glass-fibre mudguard (choice of colours)
  • Semi-straight handlebars, high bars, or clip-ons
  • Chrome headlamp brackets
  • Chrome or alloy call-ended control levers
  • Friction steering damper
  • Alloy fork top yoke
  • Alloy wheel rims
  • Avon G.P. rear tyre, or 4.00 x 18 Avon tyre
  • Suspension gaiters front and rear, black or red
  • Cibie light unit
  • Chrome plated chaincase, chainguard, battery box and oil
  • The following choice of colours are available:- red, yellow, racing green, silver or blue tank

Gearbox

4 speed
semi close ratio
Alternative
ratios
Gear Ratio Speed Gear Ratio Speed
Top 4.53 124 mph Top 4.96 113 mph
Third 5.50 104 mph Third 6.05 93 mph
Second 7.65 74 mph Second 8.40 67 mph
First 11.50 49 mph First 12.70 44 mph

www.woodgate.org/dunstall/69nor2.html / Webmaster / Revised 24th February 2000