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This series of shots shows one of the custom street
machines made by Curtis Racing Frames in 1974/5. It is a Vincent engine
special. Being a Vincent enthusiast, it was logical that I wanted to
improve on the racing Vincent I used in the 60's, and build a sport
bike for the street.
These photos supplied by the owner Mr. Jim Brokensha of Vancouver Canada
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This bike featured a tubular backbone frame, Norton
gearbox/transmission, Rickman-style gas tank, Vesco style seat, Honda
wheels and brakes and Dunlop tires. A very special oil tank was made up
to clear the rear carburetor of the v-twin engine and the fairing and
screen was a Dunstall Mark II replica. The owner had modified the
engine extensively for performance. This bike is now owned by Jay Leno.
See ARTICLES Page.
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The HRD on the tank are the initials of the original
designer of the Vincent motorcycle, Howard R. Davies. When Mr. Davies'
company failed in the 1930s Philip Vincent took it over and developed
the V-twin idea further. Vincents went out of production in 1955. The
Vincent Owners' Club, based in the UK has recently completed the
re-manufacture of all of the component parts for those motorcycles
through its VOC Spares Company Ltd.
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See ARTICLES Page for the full story.
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We were asked to build some mono-shock Honda 750
SOHC 4-cyl. frame kits for a customer in Ontario. The frame was
designed to accept the Yamaha TZ mono-shock unit. Four of these frame
kits were built – 2 were supplied to Ontario, one to Winnipeg and the
other to a Vancouver customer. The Vancouver customer built his into a
street bike using a much modified 750 Honda engine. This article describes the trouble this customer went to, using a Piper UK Honda K1 cylinder head with 4 valves per cylinder.
We have since learned that one of the 750 frames
sold in Ontario was recently found with a 550 Honda 4-cylinder engine
replacing the original. It had been successfully raced in Ontario in
the 80's and 90's.
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