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AJS Model E1 / E2

Make Model.	AJS Model E1 / E2
Year	1925
Engine	V-twin, side valve, detachable head, aluminium pistons
Capacity	799 cc / 48.8 cub in
Bore x Stroke	74 x 93 mm
Cooling System	Air cooled
Lubrication	Total loss lubrication system with hand pump (Pelgrin mechanical pump optional)
Oil Capacity	1.1 L / 1.2 US gt
Exhaust	2-into-1
Induction	Binks carburetor
Ignition	Enclosed Lucas magneto, handlebar control
Starting	Kick
Max Power	5.96 kW / 7.99 hp
Clutch	Multi plate with cork inserts
Transmission	3-Speed
Final Drive	Chain
Gear Ratio	1st 16.0 / 2nd 9.0 / 3rd 5.0:1
Frame	Heavy gauge tubing throughout, with steel panelling
Front Suspension	Rigid
Rear Suspension	Rigid, spring loaded saddle
Front Brakes	Internal expanding drum, operated by right foot pedal
Rear Brakes	Internal expanding drum, operated by left foot pedal
Wheels	Interchangeable
Front Tyre	700 x 80 mm, Dunlop Cord Heavy Non-skid
Rear Tyre	700 x 80 mm, Dunlop Cord Heavy Non-skid
Wheelbase	1448 mm / 57 in
Ground Clearance	127 mm / 5 in
Dry Weight	143 kg / 316 lbs
Fuel Capacity	10.2 L / 2.7 US gal
Top Speed (estimated)	80 km/h / 50 mph
Colours	Black enamel

The history of AJS dates back to 1897 when the Stevens brothers assembled the first Stevens motorcycle using an American made Mitchell engine. The first of the famous line of side-valve twins was the Model D of 1912, having a capacity of 698cc. Various engine capacities were used in the ensuing years, the 1925 model being of 799cc although the intention had been to introduce a 900cc version.

Rather oddly, AJS who had been the innovators of the saddle tank, dropped this when introducing their new frame for the 1925 season and reverted to the older style of carrying the tank between the top tubes.

Two versions of the Model E1 were available, the de-luxe having fully enclosed driving chains and Lucas magdyno lighting, whilst the austerity model had chain guards only and no lighting set.