The high technical specification resulted in the machines being more expensive compared to other manufacturers models.

The initial model, BS Champion, had a pressed-steel frame and was powered by a fan-cooled 50-cc two-stroke engine.

These machines were powered by state of the art disc valve two strokes which Tohatsu had previously been involved in.

Tailung manufactured the engines and mounted them in their own cycle parts to make trail and mini-bikes.

The model had a pressed steel frame, a shrouded, fan-cooled two-stroke engine with a 3 speed gearbox.

[4] The single cylinder two-stroke engine was fitted with a rotary valve and produced 7.8 bhp.

A limited edition 100+ Racer was available, which had a tuned engine with hand polished ports and s special carburettor.

The engine used rotary valves to control the inlet with the carburettors mounted by the ends of the crankshaft.

This model had a tuned engine, including modified disc valves and hand-polished ports.

[20] Bridgestone unveiled a prototype 200 cc cafe racer at the 1966 Tokyo Motor Show.

[21] Introduced in 1967, the 350 GTR was powered by an air-cooled, 345 cc (21.1 cu in), two-stroke, straight-twin engine, which produced 37 hp (27.6 kW; 37.5 PS) at 7,500 rpm.

The engine used the rotary disc-valve induction system, two of these disc valves were used (one per cylinder), and a 26 mm Mikuni carburettor was bolted to each one.

Chassis-wise, the 350 GTR was fairly conventional, as it used a steel twin-cradle frame, gaitered front forks with twin shock absorbers at the rear, 19" wheels and drum brakes.

[22] To gain publicity for their motorcycles, Bridgestone's management decided to set a road racing programme with their machines.

The team arrived in Britain to participate in the 1966 Isle of Man TT, but the event was postponed due to a seamen's strike.

Riders were Morishita, Tommy Robb and Steve Murray, with Jack Findlay as reserve.

In the race the machines were no match for the Hondas and Suzukis, Morishita finished 6th, Findlay (who had substituted for Robb) 8th and Murray crashed out.

[25] At the final race of the season at Fisco Honda withdrew over concerns about the circuit's safety.

Suzuki dominated the race and the Bridgestones of Robb, Findlay and Morishita finished 5th, 6th and 7th.

Race-prepared 177 Dual Twin machines, sleeved down to 125 cc, were raced by Dutchmen Jos Schurgers and Henk van Kessel from 1972 to 1975.

They had some success, the best season being 1973 when Schurgers won the Belgian GP and finished 3rd in the championship.