c.1950 Vincent 499cc Grey Flash Replica
Frame no. RC 8306
Engine no. F5AB/2A/3073
Development work by factory tester George Brown, himself an accomplished racer, resulted in the Vincent Grey Flash: a tuned version of the Series C Comet single with a power output of 35bhp and a top speed in racing trim of 115mph. The 'Flash retained the overall look of the Comet roadster, with Vincent's distinctive Girdraulic front fork and cantilever rear suspension, but featured an Amal TT carburettor, Elektron magnesium-alloy brake plates and an eye-catching pale grey colour scheme. Success eluded the works Grey Flashes in both the 1950 and '51 Isle of Man TT races but the model chalked up some notable victories on mainland short circuits in the hands of factory apprentice John Surtees. Catalogued only for the 1949 and 1950 seasons, during which time a mere 31 were completed, the Grey Flash is one of the rarest and most desirable of post-war Vincents.
This Grey Flash Replica was constructed approximately 25 years ago by the present owner in the Isle of Man, using a genuine Grey Flash for reference. It was constructed using 90% original parts, the rest being new. Leading Vincent experts Ted Davis, Glyn Johnson, Don Alexander and the late Chas Guy all provided assistance during its construction. The timing gears have been machined as per 'Flash, as have the forks, head stock and swinging arm, while the cylinder head has been ported and MkII cams installed. Differences from original specification include a two-start oil pump worm (for improved lubrication) and Monza-type oil tank filler. All breathers feed into the oil catch tank and thus conform to modern regulations.
The vendor has regularly paraded the Grey Flash at the following venues: Isle of Man TT Mountain and Willaston circuits; Jurby Airfield ('Festival of Motorcycling'); Ramsey Sprint; Thundersprint; VMCC 'Festival of 1000 Bikes'; Wirral 100 events at Anglesey Circuit; and Croix en Ternois, France. It won the concours at the 2005 Thundersprint for best competition machine and comes with the awarded cup. This Grey Flash Replica also features in the recently published book 'Vincent Motorcycles Since 1955' by David Wright.
- There is no frame or engine number visible.