The 1922 Olympia Show.
SPARKBROOK. (Stand 131.)
Sparkbrook Mfg. Co., Paynes Lane, Coventry.
Well finished Cycle Work.
2½ H.P. Model.
67x70 mm. (247 c.c); single cyl. two-stroke : drip feed lubrication : B. and B. carb. : flywheel mag.; 2-sp. gear; clutch and kick-starter: chain and belt drive; 26 x 2¼in. tyres. Price £50.
This model remains unaltered from last year, but is worth attention in all its cycle details, such as the duplex handle-bar fixing and the length of steering head lug.
2¾ H.P. Model.
70x90 mm. (346 c.c); single cyl. four-stroke; side valves; hand pump lubrication; B. and B. carb.; chain-driven mag. : 3-sp. gear; clutch and kick-starter; chain drive; 26x2¼4in. tyres. Price £66.
The 346 c.c. J.A.P.-engined model is an entirely new one of excellent quality throughout. Details of interest include the very neat expansion chamber located unostentatiously beneath the gear box. The head lug is carried well down below the point where a front sidecar attachment would be fixed, and it is then chamfered. The near-side stay of the rear mudguard swings out so that the wheel can be cleared for tyre repairs instead of weakening the guard itself by a hinge. Very substantial drawbolts are used for the rear chain adjustment. The mounting of the front guard by lugs on both fork members is notable. Altogether the cycle work is admirable throughout.
2¾ H.P. Model.
70x90.5 mm. 349 c.c.; single-cyl. four-stroke; sleeve valve; hand pump lubrication; B. and B. carb.; chain-driven mag.; 3-sp. gear; clutch and kick-starter; chain drive; 26x2¼in. tyres. Price: Solo, £69; with Sidecar, £89.
This model differs from the foregoing solely in the engine, which is the popular Barr and Stroud sleeve valve pattern. The installation has been very neatly carried out with the magneto sheltered behind the cylinder. The engine cradle is very stiff, and the oil from the crank case release is neatly directed on to the primary chain.
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