| MODEL | AJS R7 1938 |
| Year | 1938 |
| Engine Type | Single-cylinder overhead camshaft, light-alloy head and barrel, chain-driven camshaft |
| Displacement / Capacity | 350 cc |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | — |
| Max Power | — |
| Max Torque | — |
| Ignition | Lucas magneto |
| Induction | — |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4-speed Burman |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Cradle with single down-tube |
| Front Suspension | Girder fork, single compression spring and twin rebound springs |
| Rear Suspension | Swinging fork with plunger-type spring boxes |
| Front Brakes | Single leading shoe drum, alloy |
| Rear Brakes | Single leading shoe drum, alloy |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | — |
The 1938 R7 was AJS's pre-war 350 cc overhead-cam racer for Junior-class events, with a magneto mounted behind the barrel and a sprung rear end. It was technically interesting but had only modest results in the 1930s, its best Junior TT finish being eighth.
