Pre 1931 Data

Model No. 16H 4.90 HP

Side valve. Bore 79mm Stroke 100mm
Positive pressure, mechanical pump with sight feed, regulated without restricting oil feed passage.
Approved variable jet type, bottom feed.
High tension waterproof
Magneto shield
Aluminium with rubber inserts fitted, protecting the Magneto from water and mud, preventing chafing of control and Magneto cables.
(Registered Design). The gases pass by means of a large diameter Exhaust Pipe, heavily nickel-plated, to a double chambered Silencer of improved design with Fish Tail fitted.
Front Chain 1/2in. x .305in.; Rear Chain 5/8in. x 1/4in. Suitably protected with a handsome aluminium chain cover , special design, giving easy access to chains and finished specially to facilitate cleaning. Detachable polished aluminium clutch cover. The front chain is automatically lubricated.
Gear Box
Specially designed Three-speed with stubbed tooth pinions.
Ratios: Sidecar 5.2, 7.6, 13.8; Solo 4.7, 6.9, 12.5.
Alternative Solo, close ratio: 4.7, 6.3, 11.3
7in. Internal Expanding Brake Front Hub.
8in. Internal Expanding Brake Rear Hub. The latter incorporating Patent Shock Absorbing Device. Cup and Cone Bearings are utilised.
Front built of 10G. Rustless Black Enamelled Spokes: Rear built of 8 x 10G. Butted Rustless Black Enamelled Spokes.
26 x3.25 Heavy Wired Type Cord Tyres
Petrol Tank
Capacity approximately 2 1/2 gallons. Cellulose finish in usual Norton colours.