I used to visit Owen’s shop every School lunchtime in about 1987. My first bikes were all from him. I never heard anything that would indicate that he’d had any racing involvement with Scotts. I always thought his own sidecar racing success was mainly with Triumph twins and he gave me advice about rebuilding the engine on the one we had.. “Don’t lighten the primary gears as they’ll chatter like hell and don’t lighten the crank because you’ll ruin the handling”. He was a really nice man. Although he’d had great success, he never made me feel anything but welcome. His TT records are here which show that he was an accomplished solo rider too:
https://www.iomtt.com/TT-Database/Events/Races.aspx?meet_code=ALL&ride_id=1431
