| Rover 3 1/2 hp Motorcycle - Specifications, Model 1911 |
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| Engine |
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| Single vertical cylinder, 85 mm bore, 88 mm stroke, 499 ccm capacity, made entirely by ROVER. |
| Ball bearings to crankshaft, the one on pulley side specially large. |
| Very large and heavy flywheels, 8 1/2 in. diameter. |
| Valves specially large, being 38 x 35 mm. |
| Cylinder easily detachable without removing other parts. |
| Tappets, special silence pattern, and easily adjustable or removed. |
| 4 in. ground clearance. |
| Carburettor and Control |
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| Brown and Barlow or Rover carburettor, with handle-bar control. |
| The control lever works inwards to open, and can therefore be easily closed with the thumb when travelling at high speeds. |
| The Magneto, Throttle, extra Air and Exhaust Cut-out, are all controlled from the handle-bar, and all work inwards to advance, and outwards to retard. |
| Ignition |
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| Bosch High-Tension Magneto, placed behind the engine and driven by Silent Chain, which requires no adjustment, as it automatically takes up all wear. |
| Covered with aluminium dust-proof case. |
| Transmission |
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| 7/8 in. Rubber V Belt on adjustable pulley. |
| Standard Gear, 4 1/2 to 1, adjustable to as low as 6 2/3 to 1. |
| Rear chain protected by ample guard. |
| Frame |
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| Wheelbase of 56 in. |
| A very low saddle position, while retaining a handsome diamond shape, and is made exceptionally strong. |
| Fitted with a special bracket for lamp and generator, in such a position that they obain all the benefit of the spring fork. |
| Tyres and Wheels |
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| 26 in. x 2 1/4 in. Dunlop Tyres on extra strong rims are fitted as standard. |
| Brake Drum is separately built. |
| Petrol and Oil |
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| 1 1/2 gallons of petrol and 1 quart of lubricating oil can be carried. |
| Petrol sufficient for 150 miles, Oil for 200 miles. |
| The specially constructed tank is fitted with large fillers, petrol gauge, and inclined pump fitted with valve. |
| There is also a pipe fitted for injecting petrol into the cylinder. |
| Stands and Carrier |
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| Stands are fitted to back and front wheels. Special spring clips are fitted to the stands. |
| Large and strong carrier over back wheel. |
| Saddle and Toolbag |
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| Brooks' B104 saddle is fitted, and is only 32 in. from the ground. |
| A special Rover design Valise, with two spring locks, is fitted on the back of the stand. |
| Mudguards |
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| Large mudguards are fitted, with special wide metal flap in front, a wide extension over the belt at the back, and a special guard over the free-wheel. |
| Spring Fork |
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| The "Druid" spring fork is adopted as standard. |
| Finish |
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| Best black enamel on conslettised frame. |
| Tank, aluminium, suitably picked out and lined. |
| Brakes |
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| Specially strong and easily detachable rim brake on front wheel, operated by hand. |
| Left nearside pedal operates powerful rim brake. |
| Number Plates |
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| Back and front number plates are supplied, of strong section, and firmly attached to the front guard extension and rear of carrier. |
| Free Engine Clutch |
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| The well known Triumph Free Engine Clutch is fitted under license from the Triumph Company. |
| Three-Speed Gear |
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| not available. |
| Silencer |
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| Specially large and efficient silencer is fitted, an the cut-out is operated from the handle-bar. |
| Price |
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| Complete, as descibed, with Lea-Reflex Rear Light £ 55 - 0 - 0 |
| A l l i n f o r m a t i o n s w i t h o u t g u a r a n t e e |
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| Rover 3 1/2 hp Motorcycle - Specifications, Model 1912 |
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| Engine |
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| As in 1911. |
| Carburettor and Control |
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| Brown and Barlow carburettor. |
| The throttle and extra Air are both controlled from handle-bar, and both work inwards to advance and outwards to retard, while the Magneto, also controlled from the handle-bar, works outward to advance. |
| Ignition |
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| Bosch weather-proof Magneto; other as in 1911. |
| Transmission |
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| Standard Gear, 4 1/2 to 1, adjustable to as low as 6 1/2 to 1. Other as in 1911. |
| Frame |
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| Wheelbase of 52 1/2 in. Other as in 1911. |
| Tyres and Wheels |
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| As in 1911. |
| Petrol and Oil |
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| Petrol sufficient for 125 miles, Oil for 300 miles. |
| The specially constructed tank is fitted with large fillers, fitted with strainers, petrol gauge, and inclined pump fitted with valve of an improved pattern which cannot stick up. |
| Others as in 1911. |
| Stands and Carrier |
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| As in 1911. |
| Saddle and Toolbag |
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| Brooks' or Lycetts' saddle is fitted, and is only 32 in. from the ground. |
| Two extra large pannier bags for tools, etc., are supplied. |
| Mudguards |
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| As in 1911. |
| Spring Fork |
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| As in 1911. |
| Finish |
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| Best black enamel on conslettised frame. |
| Tank, aluminium, suitably painted. |
| Brakes |
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| As in 1911. |
| Number Plates |
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| As in 1911. |
| Free Engine Clutch |
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| As in 1911, but only when this fitment is required. |
| Three-Speed Gear |
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| The Armstrong Triplex Three-speed Gear, so successful in Tourist Trophy and other Competitions last year, is the variable gear we have decided to adopt as option. |
| Silencer |
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| Specially large and efficient silencer is fitted, an the cut-out is operated by the left foot. |
| Prices |
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| Fixed engine pattern £ 49 - 0 - 0 net. |
| With Triumph Free Engine Clutch £ 55 - 5 - 0 net. |
| With Armstrong-Triplex Three-speed Gear £ 59 - 10 - 0 net. |
| A l l i n f o r m a t i o n s w i t h o u t g u a r a n t e e |
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| Rover 3 1/2 hp Motorcycle - Specifications, Model 1913 |
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| Engine |
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| As in 1911. |
| Carburettor and Control |
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| As in 1912. |
| Ignition |
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| As in 1912. |
| Transmission |
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| As in 1912. |
| Frame |
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| As in 1912. |
| Tyres and Wheels |
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| 26 in. x 2 3/8 in. Dunlop Tyres on extra strong rims are fitted on 3-speed models. Other as above. |
| Petrol and Oil |
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| Petrol sufficient for 180 miles, Oil for 300 miles. |
| The specially constructed tank is fitted with large glass-top fillers. |
| Others as in 1912. |
| Stands and Carrier |
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| As in 1911. |
| Saddle and Toolbag |
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| Brooks' B170 Pan saddle is fitted, and is only 27 in. from the ground. Others as in 1912. |
| Mudguards |
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| Rear guard detachable with carrier, for tyre repairs. Other as in 1911. |
| Spring Fork |
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| As in 1911. |
| Finish |
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| Best black enamel. |
| Tank black enamelled, suitably panelled in aluminium and red. |
| Brakes |
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| As in 1911. |
| Number Plates |
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| As in 1911. |
| Free Engine Clutch |
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| As in 1912. |
| Three-Speed Gear |
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| As in 1912. |
| Silencer |
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| Specially large and efficient silencer is fitted, an no cut-out is necessary. |
| Prices |
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| With Triumph Free Engine Clutch (2 1/4 in tyres only) £ 55 - 0 - 0 net. |
| With Armstrong-Triplex Three-speed Gear Mark VI direct on top £ 58 - 0 - 0 net. |
| A l l i n f o r m a t i o n s w i t h o u t g u a r a n t e e |
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| Rover 3 1/2 hp Motorcycle - Specifications, Model 1917 |
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| Engine |
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| Three ball bearings to crank shaft, the two on chain side specially large. Steel flywheels. Nickel steel valves, specially large and interchangeable. |
| 4 1/2 in. ground-clearance. |
| Other as in 1912. |
| Carburettor and Control |
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| As in 1912. |
| Ignition |
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| Weather-proof high tension magneto. Other as in 1911. |
| Transmission |
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| Silent chain drive to clutch on gear box, thence by belt from large pulley to rear wheel. Standard gear, 4 7/8 to 1. |
| Frame |
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| Gives long wheel base of 54 in., a very low saddle position, and is made exceptionally strong and suitable for side-car work. |
| Tyres and Wheels |
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| 650 x 65, Dunlop Voiturette three-ribbed tyres on extra strong rims. |
| Petrol and Oil |
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| 2 gallons of petrol and 3 pints of lubricating oil can be carried. |
| The specially constructed tank is fitted with large glass-top fillers, and supplied with strainers and special oil pump fitted with shut-off valve, which prevents any leakage to the engine. |
| A tap and pipe are fitted for injecting petrol into the cylinder. |
| Stands and Carrier |
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| As in 1911. |
| Saddle and Toolbag |
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| As in 1913. |
| Mudguards |
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| Large mudguards are fitted, with special wide metal flap in front, and a wide extension over the belt at the back. |
| The rear guard extends downwards to the front to prevent water dripping on the bottom part of the belt, thus preventing slip. |
| The rear guard and top of carrier swing up on removing two thumb screws, facilitating tyre repairs. |
| Spring Fork |
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| The "Druid" type spring fork is fitted as standard, with the addition of spring links at top, which take up all end thrust. |
| Finish |
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| As in 1913 |
| Brakes |
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| Left (near-side) pedal operates very powerful brake on belt rim. Other as in 1911. |
| Number Plates |
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| As in 1911. |
| Free Engine Clutch |
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| n/a |
| Three-Speed Gear |
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| The countershaft three-speed gear box gives ratios of 4 7/8 to 1, 8 1/3 to 1, and 15 to 1, with direct drive on top. |
| For solo work a larger sprocket may be fitted to special order, making top gear 4 3/8 to 1, and others in proportion. |
| Silencer |
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| As in 1913. |
| Foot-boards |
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| Rover patent swinging foot-boards fitted as standard to three-speed models. |
| Prices |
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| n/a |
| A l l i n f o r m a t i o n s w i t h o u t g u a r a n t e e |
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