After leaving Douglas[clarification needed] the first time, Pullin worked with Groom again to refine his ideas and develop and patent the Ascot-Pullin motorcycle.

[4] Pullin was an innovator and the Ascot-Pullin 500 OHV single had the engine horizontally mounted and enclosed with a pressed-steel frame.

[2] As well as the first use of hydraulic brakes on a motorcycle, Pullin also designed a telescopic centre stand and an adjustable windshield with a windscreen wiper and rear-view mirror, as well as a fully enclosed chain and interchangeable wheels.

[5][2] The Ascot-Pullin name was revived in 1951 by the Hercules Cycle and Motor Company, a division of Tube Investments, who commissioned Pullin's new invention, the "Powerwheel", a 40 cc (2.4 cu in), 0.7 hp (0.52 kW), single-cylinder rotary engine.

The prototypes were scrapped after the company decided not to proceed with production, but a sectionalised example survived together with most of the drawings, and an industrialised version was developed for the Ministry of Supply.