Engine internals - piston, flywheels and connection rod.
Part sectional view of the shock-absorber fitted to the engine shaft of the 4 h.p. Triumph.
Channels are rolled in the new Triumph rear guard to carry away liquid mud.
One of the most familiar two-strokes the 2¼ h.p. Junior Triumph.
Little or no mud should be able to get past the new Triumph guard. Note also the enclosed fork springs.
Triumph. (Stand 114.)
4 h.p.; 85x97 mm. (550 cc); single-cylinder four-stroke; side-by-side valves; hand pump lubrication; Triumph carburetter; M-L chain-driven magneto; three-speed Sturmey-Archer gear; chain-belt drive; 26 x 25in. tyres.
Triumph Cycle Co., Coventry.
Though the modifications in the 4 h.p. Triumph for 1921 have been in the shape of detail improvements only, there is little doubt that the Triumph stand will be, as usual, a centre of attraction. One point which will be much appreciated is the provision on the sidecar models of footboards instead of footrests. These are of all metal with aluminium edgings. Another ingenious improvement consists in the provision of vertical troughs, which form the front mudguard stays, which are designed to catch the liquid mud thrown up by the front wheel, allowing it to trickle on the ground, and preventing it from flying over the driver or the sidecar passenger.
The chain-driven model is similar in practically every respect except that the Triumph three-speed gear box is fitted and all-chain transmission. In both models the mud-guarding has been somewhat improved, there being valances for the front guard, while the rear guard is wider. Four sidecar models are shown, and one of these is equipped with the Triumph gear box, all-chain transmission is provided, and the Lucas Magdyno. A transmission shock absorber is now fitted to both chain and belt-driven models.
Among the interesting parts shown on the stand is an example of the spring for the Gloria sidecar. It is of the enclosed coil spring variety, and is provided with a check spring of volute pattern, which should do much to increase the comfort of the passenger in the sidecar, and relieve the chassis from strain.
2½ h.p.; 64x70 mm. (225 cc.); single-cylinder two-stroke; petroil lubrication; Triumph carburetter; chain-driven Maglita; two-speed counter-shaft gear; chain and belt drive; Dunlop 24x2¼ in. tyres.
This has long been a popular and economical solo mount for both sexes. Fitted with the Maglita lighting and ignition set, it is altogether a thoroughly attractive little proposition, possessing excellent features of design and the wonderful Triumph finish. Noteworthy points are the size of the rear brake shoe and the peculiar method of actuating the, change-speed, which is through a Bowden pattern lever on the handle-bars.
Olympia Show. The Motor Cycle, December 2nd, 1920. Page 712
More on the 1920 Triumph 4 h.p.
