TT Douglas in now sold
Frame Number OF206, Engine
Number FH101, Gearbox Number UG413
The TT Replica (IoM Model) Douglas evolved from
the famous RA Douglas (also referred to as the IoM Model), winner of both the Senior and
Sidecar TTs in 1923. Douglas servo brakes replaced the Research Association 'disc'
brakes of the RA, and the new gearbox (which differed from that of the road-going OB by
having its main shaft forward of, instead of behind, the counter shaft) was mounted to the
frame under the seat, instead of being fixed to the back of the crank case as it was on
the RA. First catalogued in 1926, the TT Replica was the production version of the machine
that first appeared in the hands of the works riders in 1925.
Survivors are scarce: probably fewer than half a
dozen running examples survive. In common with most other racy Douglases of the 1920s,
this example has a number of deviations from standard specification (such as they are
known) but importantly (and possibly uniquely?) features prefixes that identify the frame,
engine and gearbox as being of TT Replica origins.
According to information provided on the Douglas
Motorcycle Forum, http://www.douglasmotorcycles.net/aa-files/html/identify-part2/vintage4.6.htm,
FH101 would likely be the first TT Rep engine of the 1927 model range, while OF206 could
be the 105th TT frame of 1926. The UG gear box prefix was used also on the road-going OC
model. In the absence of information about production numbers, or precise provenance for
the bike, it is not known whether the engine, gearbox and frame left the factory together,
however the components seem consistent with a machine assembled at the end of the 1926
model year or the very beginning of next.
It is likely that the machine would have been
fitted originally with cylinder heads using screw-on rings to retain the manifolds, but
given the huge success of the DT Douglas in competition in the late 1920s it is not
surprising to find DT-pattern heads and barrels now fitted. Another feature sometimes
associated with the TT Replica - a rear brake drum fitted with a removable sprocket and
dog coupling to the hub - is not seen on this example. (So rare is this feature that I am
aware of but one extant example!) As a concession to safety and economy of tyre wear, the
bike is fitted with 23" wired on rims and tyres. It is likely that there are other
variations from catalogue specification, but overall here is a machine that represents the
mid-vintage British motorcycle at its peak: low, light, fast, and impeccably behaved.
The bike has been rallied extensively for more
than 30 years, and is believed to be in excellent running condition.
A unique opportunity to acquire a rare and
desirable riders' motorcycle.
Details of the Expression of
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