In the 1920s P&M were successfull in the TT with 18 year old Tommy
Bullus coming fourth in the Senior TT in 1925. TT replicas / entrants were
manufactured from 1925 to 1928. The 1928 machine had an improved sumpless
490cc engine with external inclined pushrods (both features visible in
drawing) and a P&M four-speed close ratio gearbox.
I am grateful to 
for permission to reproduce this picture from the March 1996 magazine.
It featured dropped bars, unsprung forks, and had a kneehook and only one backward sloping footrest. The wheels were 23" (front) and 22" (rear) and there were no brakes. The oil sump was missing, replaced with a manually operated pump. Only a short stub exhaust was fitted. All these modifications reduced the weight to just 185lbs.
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