Grey Flash 2751

The history and restoration of a Vincent HRD Grey Flash

When I acquired 2751 it was fitted with a BT-H BKH1 magneto. Nearly all Grey Flashes were fitted with BT-H TT magnetos so I knew this was not correct to the bike. Also, the retard fitting was for the opposite rotation. I wasn’t expecting to be able to find a BT-H TT magneto very easily …

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I was initially worried that I might have to try and source a correct carburettor for 2751. This is what came fitted to the bike: This appeared to be of the correct clip-fitting configuration. The float bowl angle should be 15 degrees. Note the film case cap – photographer Peter Johnson’s touch no doubt! I …

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As acquired 2751 had a tacho’ fitted, perfectly functional but of the incorrect type. First port of call was Franco, again! He included the correct parts together with the other items that he let me have. The tachometer I also thought that I needed was one of the striking Smiths instruments of the racing pattern …

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When I acquired 2751, it had fitted to it a very smart looking painted petrol tank that has been signed by John Surtees at an event in Japan (see pic in the ‘History’ section of this blog). This tank looked splendid but as I dug into the original specification of 2751 I realised that the …

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Vincent racing motorcycles were fitted with a special and simplified chain adjustor. Racing models were supplied with a T-bar adjuster and locknut. These were not present on 2751 though they were originally fitted. David Dunfey kindly put me in touch with Vic and Matt Olsen, who were making some, and they agreed to make me …

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The front brake plates of the Grey Flash were the same as those fitted to the Black Lightning models. They were made from Elektron magnesium alloy with a detachable air scoop and a neat mesh screen to prevent grit ingress. A solid axle featured a waisted bolt, for lightness and ribbed Black Shadow drums were …

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Forks The Vincent Girdraulic fork legs are an instantly recognisable feature of later Vincent HRD motorcycles. The legs are handed but cleverly machined from a single forging. Some people say that they were produced for Vincent by the Bristol Aircraft Co. but I have read that this is not actually true. Anyway, the fork legs …

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