The beginning

Herron's career started in 1965 when he competed in numerous events throughout Ireland, building up his experience along the way. In 1970, he won his first major race, the 350 class at the North West 200.

The 1970s

After winning the 1973 Irish 350cc championship, he moved up to the Grand Prix world championships. During these years, Herron competed as a privateer, against the factory backed riders, and it was a David vs Goliath struggle to compete. During this time, he met and eventually married Andrea, a sister of sometime Norton rider Peter Williams. They eventually had two girls, twins named Kim and Zoë.

At the close of 1976, he finished fourth in both the 250cc and 350cc world championships. Herron won the last Senior TT at the Isle of Man TT before the FIM stripped the event of its world championship status in 1976.^[1] The following year, he finished runner-up in the 350cc world championship to Yamaha factory rider Takazumi Katayama.^[2]

In 1978, Herron strengthened his position as one of the world's best riders on privateer machinery with fifth and sixth places in the 250cc and 350cc world championships respectively.

For the 1979 season, he finally got his big break, as a full works, manufacturer backed rider for the Texaco Heron Suzuki team in the 500cc world championship, alongside two-time world 500cc world champion Barry Sheene, and future Truck racer Steve Parrish.

The season started well, with a third in Venezuela and Italy, and a fourth in Austria. This left him in third place in the championship after three rounds. At the fourth round in Spain he crashed in practice and broke his right thumb, suffered third degree burns and was unable to race. He finished the season in tenth place.