1927 AJS Model H4


1927 AJS MODEL H4
AJS built a fine line of motorcycles in the late 1920s, including side-valve (SV) and overhead valve (OHV) singles ranging in engine size and output. Horsepower was in the single digits across the board. The H4 was a 350cc SV single with advanced features for the day. Special alloys were used on critical internal parts like the valves (intake & exhaust valves were interchangeable), gears and so forth. The Binks carburetor was considered ‘semi-automatic’ and was said to provide “fierce acceleration”, all from 3-1/2 horsepower. The 3-speed gearbox was hand-shifted from the right side of the tank. It had a bicycle-style diamond frame with flat tank and rigid rear section. The front forks were girder-styled with shock absorbers.

1927 AJS Model H4 SPECIFICATIONS

Engine type:

Displacement:

Output:

Carburetor:

Ignition:

Lubrication:

Gearbox:

Frame:

Front suspension:

Wheelbase:

Seat height:

Wheels:

Tires:

Fuel capacity:

Oil capacity:

Air-cooled side valve single

350cc / 21 ci

3.49 hp

No. 344 Binks

Lucas KSA1 magneto

Hand pump (1 squirt per 5 miles)

3-speed, hand-shift/foot clutch

Rigid, diamond (bicycle-style) frame

Girder, damped

53.5″

28.0″

26″ X 2.375″ F&R

non-skid Dunlops F&R

1.5 Imperial gallons

1 quart

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