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Mk 1 OHV probably out of production although still listed. It is doubtful whether any were made in 1924. MK 1 Side Valve. 1924 Records show 14 of this model. THE NEW SS80 was announced early in 1924.
The important change was that the SS80 now featured a brand new cradle frame developed from the Le Vack Brooklands racing bike. This meant a much more stable and safer ride. With a ground clearance of 4 ¼ inches and a saddle height of 26 ½ inches the frame was a class leader. The forks now were Brampton no 2's with no damping mechanism; these were perhaps the weakest part of the new set up. Power
was provided by a new ‘sports’ JAP double camshaft
engine. Power output was up by 5 BHP to 30BHP. This gave a guaranteed
80MPH and in 1924 was enough to outpace virtually anything else
on the public roads. The engine now was supplied with a full mechanical
oil pump freeing the rider from having to remember to manually
supply oil to the engine whilst in motion. The gearbox remained the 3 speed, 4 stud, heavyweight Sturmey. The SS80 offered the option of a vastly improved Lucas lighting system. Twist grip handlebar controls could be specified as well as tool bags, front and rear stand, and a luggage carrier. Cast alloy exhaust coolers and silencers gave a very desirable up to date look to the bike. At £150 fully equipped, this was an extremely expensive bike when the average weekly wage was less than £3. Many successes
in major competitions such as the London to Edinburgh, Exeter and
Lands End Trials, as well as racing and sprinting gave George Brough
and his company wonderful publicity and kudos. Total
sales had risen from just over 100 per annum in 1922 and 1923 to
nearly 200 in 1924. This encouraged more development leading to
the announcement in the December Motorcycle Show of the brand new
SS100 which would set the ultimate standard for motorcycles right
up to the outbreak of war in 1939.
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