Dunlop then began a record breaking run at the Cookstown 100, where his first win came in the 1985 250 cm3 race. Riding an ECM, he averaged 88.57 mph to take the chequered flag ahead of Gary Cowan (EMC) and Noel Hudson (Rotax). His most successful year was 1987 when he scooped the prestigious ""Man of the Meeting"", winning 125 cm3, 350 cm3 and 1000 cm3 races. Four more 125 cm3 victories followed in 1988, 1989, 1991 and 1993; a total of eight victories in the event.