| THE DBD34 was the last,
fastest and best known of the Gold Star family but the story starts in 1937
when BSA tuned a 500cc ohv Empire Star single for Walter Handley to race
at Brooklands.
He
won first time out with an outstanding best lap of 107.57mph to clinch
the coveted Gold Star awarded for lapping the Surrey track at over 100mph.
BSA cashed in with the M24 Gold Star in honour of Wal's achievement. Each
bike was individually built from selected components. The engine was tuned,
had an alloy head and barrel, magnesium gearbox casings and each bike
came with a dyno certificate proving it made at least 28bhp.
After the war a new
Gold Star was built. BSA's most talented engineers worked on the bike.
Bert Hopwood redesigned Val Page's original M24 engine into two units:
the 350cc B32 and 500cc B34.
Roland Pike was responsible for transforming the humdrum touring single
into a firebreathing race winner, and accomplished scrambler Bill Nicholson
developed the swingarm frame fitted from 1953 onwards.
The
bikes were offered with a choice of four camshafts, three sets of gears,
four compression ratios and a selection of different petrol tanks, exhausts
and handlebars. BSA intended the Gold Star to be competitive in all forms
of bike sport.
And it was. The 1949
Junior Clubmans TT was won by Harold Clark on a 350 Goldie at an average
of over 75mph. By 1955 33 of the 37 riders in the
Junior TT were on Gold Stars. And it was every bit as good off road as
on, winning numerous scrambles and other events.
The 500cc DBD34 is
the best known and most popular of the Goldies though there are lots of
riders who'll tell you the 350 is a better bike. The DBD arrived in 1956
with sharper steering geometry, improved suspension and brakes and full
road gear.
The engine made a
claimed 40bhp at an outrageous (for the time) 7000rpm.
The
secret was in the use of light materials and careful attention to lightening
the rocker gear and assembly of the engine. The specially designed four-speed
RRT2 gearbox had a first gear capable of 60mph and three very close ratios
to follow. The RRT2 was once described as a five-speeder with first missing.
It gave the Gold Star a huge advantage on the track.
Engine casings resemble the B series tourers but hold a bigger drive-side
main bearing and the engine number should be suffixed GS.
The Lucas Magdyno
is the central part of a fairly feeble electrical system and must be in
tip-top condition for trouble free starting.
The duplex frame has been overshadowed historically by Norton's Featherbed
but in reality is every bit as good. The genuine DBD frames are prefixed
CB32 and the Clubmans frame should have lugs for rearset footrests.
Suspension was firm at the rear but a little too soft and underdamped
at the front though it didn't stop the Gold Star winning races.
More
on the DBD34
Pearson's Seeley Goldie
Miscellaneous
Pics
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