The 1922 Olympia Show.
Flat Twin and New Solo Single.
2¾ H.P. Model.
75x79 mm. (349 c.c,); single cyl. four-stroke; side valves; drip feed lubrication; Amac carburetter; chain-driven mag.; 3-sp. gear; clutch and kick-starter; chain drive; 26x2¼in, tyres. Price £55.
Humber, Ltd., Coventry.
The new Humber lightweight is a superbly finished example of its class, conspicuous for a very heavily finned cylinder and clean aluminium castings. Points of interest are the enclosed kick-starter, large quickly detachable clutch cover, Brampton spring chain, and Webb front brake.
Black all-weather finish is optional on all Humber machines without extra charge, and these models display the absolute minimum of bright parts. The exhaust system on the 349 c.c. model is interesting; a long pipe leads to a cast aluminium expansion box behind the gear bracket, the rear end of this box being reduced towards the final exit.
4½ H.P. Model.
75x68 mm. (600 c.c.); twin cyl. four-stroke; side valves; mechanical lubrication; (Claudel-Hobson carburetter; gear-driven mag.; 3-sp. gear; clutch and kick-starter; chain drive; 650x65 mm. tyres. Price: Sports, £89; Touring. £99; with side car, £105 and £120 10s.
For 1923 the flat twin engine has under-gone no substantial alteration, although certain detail changes have been made in the lubrication system. The stirrup brake has been eliminated from the touring model, and with the substitution of a front belt rim brake both wheels are now interchangeable. This alteration has naturally led to a broader front fork and 6in. mudguards. The stirrup brake, narrow fork and guards are still retained on the sports model. The price of the latter, inclusive of a doorless Grindlay sidecar, is noteworthy.
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