1970 Dunstall Triumph

During the 1960’s and 70’s there were companies started by ex-racers that took what the factory offered and made it their own. Paul Dunstall was one of these racer/builders and a 1970 Dunstall Triumph is being .

Starting racing when he was just 18, Paul Dunstall designed his own parts to be competitive. By 1961 he had a catalogue of parts, and in 1966 started to build complete bikes. Starting with a stock  Norton, BSA or Triumph, he would strip it down and put it back together with his fairings, seats, and exhaust. He would then replace heavy steel components with lightweight alloy parts. For a few dollars more you could get Dunstall to tune your engine with improved porting, and larger carbs. The great history I found also showed that Paul would work with Universitiy engineers to develope his exhaust for better power.

The seller gives provenance for his bike

Titled as a 1971 Dunstall (engine and frame are matching numbers with a a July build date), not a stateside conversion.  Have documentation from VMCC that it was shipped to Dunstall and the dates.

The history of Paul Dunstall tells that 1970 offered a new twin disk system up front. This bike offers twin disk up front but it is hard to tell enough details to know which set up is offered.

Seller states:

 

The master cylinder and calipers are rebuilt with new pads, 20 miles.Tires are almost new…the wheels are Borranis as is correct for a Dunstall.

For the engine Dunstall replaces the 650cc cylinders with a larger 750cc big bore kit. This engine comes with a Routt steel unit, who was another aftermarket performance designer of the time. Quaife was a name from the period known for the 5 speed transmissions offered on this bike.

The seller also points out the faults:

windshield which has been replaced (Gustafson), bike as not been down while moving, believe it has tipped over and cracked fairing and windshield.  Fairing has had slight repairs done to it……Del’Orto 34mm pumper carbs (not original – should be 32mm Amals)

Yellow may not be a color that you would choose for yourself, but when buying a period modified bike, you often have to accept the period popular colors. Maybe you can paint the spare fairing a color of your choice.

BB

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