Dunstall Motorcycles
1971 Dunstall Norton Tourer
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The tourer is an ideal machine for reliable high performance touring with a realistic luggage carrying capacity. With 4.84 gearing it will give searing acceleration combined with a comfortably high cruising speed, plus really good steering and stopping.
Specification (Cycle)
- Norton Commando Frame
- Roadholder Forks
- Twin leading shoe Front Brake (twin disk optional extra)
- Balanced exhaust system
- Decibel Silencers
- 3 or 5 gallon glass fibre or 4 gallon alloy fuel tank
- GT dual seat incorporating locking toolbox, number plate and rear mudguard
- Pannier cases and luggage rack
- Glass fibre or polished alloy front mudguard
- Colour options for glass fibre items are: Red, Silver, Yellow, Blue
Engine Specification
- Bore 73mm Stroke 89mm
- Capacity 745cc
- Re-sphered & machined combustion chambers
- Steeper valve angle (Inlet) 26½°
- Enlarged hand finished and polished ports
- Special H 18 S material valves 1 5/8" inlet
- Bronze Hi-Dural valve guides
- Special dual rate springs
- Enlarged induction manifolds
- 10:1 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 68 Bhp at 7000
Gear Ratio Options
Four speed semi-close ratio
| Overall Gearing | |
|---|---|
| Ratio | Max Speed |
| 4.84 | 115 mph |
| 4.56 | 121 mph |
| 4.38 | 125 mph |
| 4.15 | 133 mph |
Five Speed Close Ration optional extra
www.woodgate.org/dunstall/71nor3.html / Webmaster / Revised 24th February 2000