Dunstall Motorcycles
1970 Dunstall Norton Export
Specification
- Norton 750 Engine
- Bore 73mm, Stroke 89mm
- Capacity 745cc
- Re-sphered and MAchined Cylinder Head
- Steeper Valve Angle (Inlet)
- Enlarged Hand Finished and Polished Ports
- Special H 18 S Material Larger Valves
- Bronze Hi-Dural Valve Guides
- Special Dual Rate Springs
- Enlarged Induction Manifolds
- 10 to 1 or 10.5 to 1 Compression Spun Cast Pistons
- Lucas Capacitor Ignition System
- Paired Amal 932/901 Type Concentric Carburettors
- Flexible Forced Oil Feed To Rockers
- Wide Heat Range Spark Plugs
- Output 67 b.h.p at 7,000 rpm
Cycle
- Norton Commando Frame, Stove Enamelled Black
- Road Holder Forks Fitted With Gaiters
- Twin Hydraulic Disc Front Brake
- G.T. or De-Luxe Fairing (Colour Choice)
- Balanced Exhaust System
- Decibel Silencers
- Dural Silencer Mounts
- Rear Mounted Footrest Controls
- 2½ or 4 Gallon Capacity Fuel Tank (Colour Choice)
- G.T. Dual Seat Incorporating Toolbox, Number Plate and Rear Mudguard (Colour Choice)
- Glass Fibre Front Mudguard (Colour Choice)
- Clip-on Handlebars with Alloy Control Levers
- Alloy Fork Top Yoke
- Polished Alloy Wheel Rims
- Chromium Plated Chainguard
- Silver or wrinkle black enamel oil tank and battery cover
Gearbox
|
Standard Four Speed
Semi-Close Ratio |
Optional Six Speed
Semi-Close Ratio Gearbox |
||||
|---|---|---|---|---|---|
| Gear | Ratio | Speed | Gear | Ratio | Speed |
| Top | 4.15 | 133 m.p.h. | |||
| Fifth | 4.78 | 115 m.p.h. | |||
| Top | 4.38 | 125 m.p.h. | Fourth | 5.57 | 96 m.p.h. |
| Third | 5.35 | 103 m.p.h. | Third | 6.46 | 85 m.p.h. |
| Second | 7.45 | 77 m.p.h. | Second | 8.81 | 62 m.p.h. |
| First | 11.2 | 48 m.p.h. | First | 11.85 | 46 m.p.h. |
www.woodgate.org/dunstall/70nor3.html / Webmaster / Revised 24th February 2000