Sparkbrook. (Stand 122.)
2½ h.p.; 70x70 ram. (269 cc.); single-cylinder two-stroke; drip feed lubrication; B. and B. carburetter; flywheel magneto; two-speed Sparkbrook sliding gear; chain-belt drive; Dunlop 26 x 2 in. tyres. Price £70.
Sparkbrook Cycle Co., Coventry.
It is remarkable how the substitution of the flywheel magneto on the Villiers engine helps to produce a clean appearance on this machine. This of course, is in addition to the other advantages of excellent low speed sparking and low weight. The combined result of the flywheel magneto and the excellent design of the Villiers piston and ports is to produce a two-stroke machine with the slow running qualities of the four-stroke as well as very good speed capabilities. One excellent point about the Sparkbrook machine is the extra sized countershaft belt pulley which has been fitted to prevent belt slip, even under the worst conditions. A simple countershaft clutch has just been introduced. It is to be noted that even the single-speed machine (priced at £64) is not directly driven, but has a simple countershaft with the same 7in. belt pulley.
Olympia Show, 1920. The Motor Cycle, December 2nd, 1920. Page 709
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