[8] An alloy cylinder head was introduced in 1955[2] and various improvements were make to the engine during the model's production run.

Primary drive was by chain to a multiplate wet clutch[9] and was enclosed in a pressed steel chaincase.

Early frame could distort if bumped into a curb which was resolved by adding a reinforcing gusset.

[13] Front suspension was short Roadholder forks and rear swinging arm pivoting on Silentbloc bushes.

[14] Brakes were 7 in (180 mm) single width drums front and rear[7] although full-width hubs were later fitted.

Power output was increased to 36 bhp (27 kW) @ 7,000 rpm by using twin 1 1/16" (27mm) Amal Monobloc carburettors,[21] larger 1.4 in (36 mm) inlet valves,[22] the camshaft from the 650 Manxman, 8.5:1 compression ratio and a siamesed exhaust.

[8] An experimental featherbed framed dominator was first seen in Holland in 1951, and the 88 was officially launched at the Earls Court Motorcycle Show later in the year.

[13] The model sold well in 1952 but supplies of the frame, which was fabricated by Reynolds Tubing, limited production to around 20 machines a week.

[23] The bolt-on rear part of the frame was replaced with a welded-on sub-frame[24] and the front brake increased to 8 in (200 mm) in 1954.

[19] An alloy head was also fitted in this year,[2] which was 13 lb (5.9 kg) lighter than the previous cast iron item.

[28] The first outing for the racing 88s was at the 1953 Daytona 200 where a pair of machines were entered and Milt Lassiter finished third.

[30] The factory stopped the Domiracer project in 1962 and the bikes and spares were sold to Paul Dunstall who continued their development.