Close-up view of the engine and transmission units of the 976 c.c. all-chain drive Zenith This machine is actually a racing model but is practically identical with that to be supplied as a standard sports model.
Zenith Three-Speed Model with 976 c.c. J.A.P. Engine.
A DEPARTURE from Zenith standard practice has been introduced in the shape of a 976 c.c. J.A.P. engined machine with all-chain drive.
The bottom portion of the frame is of the duplex variety, the chain stays extending forward to a cross member beneath the front engine lug. The Sturmey-Archer gear box is carried on a special bracket extending from the top of the rear engine plates to a cross stay joining the duplex members behind the box. A special bracket which carries the change speed lever is fixed above the gear box by two of the clamping bolts; thus the control slides with the box for chain adjustment purposes, without interfering with the operating rod adjustment.
The particular machine illustrated is a special racing variety of the model under consideration; it took part in last Saturday's 200-mile sidecar race. The main, design of the stanaard model is essentially the same, except that the exhaust pipes lead first of all into a large expansion chamber underneath the magneto, and terminate in a long exhaust.
Manufactured by Zenith Motors, Ltd., Hampton Court, Middlesex, the price is £12 with standard J.A.P. engine, or £13 with the special super-sports unit.
The Motor Cycle June 29th, 1922. Page 878
