The 1922 Olympia Show.
J.E.S. (Stand 38.)
Four speed 150 lb. Lightweight.
2½ H.P. Model.
68x68 mm. (247 c.c.); single-cyl. two-stroke; automatic lubrication; Amac carburetter; chain-driven mag.; 4-sp. gear; clutch and kick-starter; chain drive; 26x2¼ in. tyres. Price, £59 17s.
J.E.S. MOTOR Co. (Gloucester), Ltd.
This year's Six Days Trials demonstrated that the 169 c.c. J.E.S. with four-speed gear box was a go-anywhere machine; there should therefore be no doubt as to the capabilities of the new 247 c.c. model which forms the chief exhibit.
The gear box is the same as was used on the smaller model in the A.C.U. Trials, but the engine is a new production, although on quite conventional lines. It is of the three-port type, and has a roller- bearing big end. Lubrication is by crank case pressure controllable by an adjustable drip feed. Special attention has been paid to balance. Quite a novel principle for motor cycles is applied in the diminutive four-speed gear box. The pinions are in constant mesh, and each pair in turn is dogged to the main and lay-shafts. Thus the drive on each gear is indirect. Similar designs are often employed in machine tools. Other important features include a massive internal expanding rear brake, a slightly smaller front brake, and girder spring forks. Transmission is by chain, and there is a shock absorber in the rear hub. Complete, this workmanlike little motor cycle weighs only 150 lb.
1¾ H.P. Model.
60x60 mm. (169 c.c); single cyl. two-stroke; automatic lubrication; Amac carburetter; chain-driven mag.; 3-sp. gear; no clutch or kick-starter; chain drive; 24x 2in. tyres. Price, £45.
The 159 c.c. miniature is shown in two forms, with direct belt drive at £29, or to the above specification with a new three-speed gear box and final chain drive at the price stated. In the first case a belt rim rear brake is employed, but on the more elaborate model the internal expanding type, as on the 247 c.c. machine, is repeated.
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