Page 25 - LHR Biker September 2025

A b e n c h m a r k f o r motorcycle history. It was excellence—all combined to
craftsmanship: born out of a lineage that make the Model 90 more than
Sunbeam was known not just for traced back through pre-war just a machine. It was, and
power and speed but build TT competition, through remains, a symbol: of what
quality, finish, and reliability. For experimentation with engine can be achieved when
many enthusiasts, owning a design, to the glorious racing attention to detail meets
Model 90 was a statement of both successes of 1928-29. Its win racing ambition.
performance and refinement. at Spa (Belgian GP), its A s t i m e p a s s e d a n d
Senior TT victories, its technology moved on, the
Influence on future machines: reputation for engineering spotlight shifted to other
The knowledge gained through
the Model 90’s successes—on
port shape, carburetion, proper
valve spring design, engine
machining—fed into later
Sunbeam models (and possibly
i n fl u e n c e d o t h e r
manufacturers).Collector value
and historical importance: Today,
Model 90s are prized in vintage
r a c i n g a n d m o t o r c y c l e
preservation. They represent
one of the last eras where a
simple, single-cylinder bested
more complex machines through
clever engineering and strong
construction.
Conclusion
T h e S u n b e a m M o d e l 9 0
occupies a special place in

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LHR Biker Magazine October 2025