He died nine days after injuries sustained racing at Oulton Park, Cheshire, England in August 1962.

[2] For 1952 he rode a BSA to second in the Isle of Man Junior Clubmans TT, averaging 80.09 mph (128.89 km/h) on his fastest lap.

Despite having to retire at the TT that year, his performance was noticed by AJS, and he joined that team for the 1953 Grands Prix World championship.

The only win was at Pau in France, there was a third at the Ulster Grand Prix, and he was in the first six placings for the Netherlands, Switzerland and Belgium.

The 1957 World Championship looked to be within reach, but a crash at Assen, in the Dutch TT meant he was out of action for a couple of months.

His teammate Libero Liberati won the 500 cc World Championship that year, with McIntyre coming second.

He also rode in Grand Prix races on Honda and Bianchi, making the podium in the Netherlands, Belgium, and East Germany.

[2] In 1962 McIntyre finished second in the Spanish and French Grands Prix, while he had a non-start in the 500 Senior TT and mechanical problems in both the 250 and 350 cc events.

After a bad start in poor conditions, he fought his way to the front before aquaplaning across a stream of water, losing control and crashing into a post holding an advertising sign, sustaining serious head injuries.

[2] In 2017, Michael Dunlop recreated McIntyre's achievement with a parade/demonstration on the TT course, at a similar speed with a 100-mph lap on a replica 1957 Gilera, and wearing period clothing.