Overnight conditions at the Isle of Man TT led to a delay of just over two hours but the race finally got underway with riders warned of damp patches at Ramsey Hairpin, the Nook and Governor's Dip. And, as in Sunday's RST Superbike race, James Hillier on the Kawasaki was again quickest on the first nine miles.
By Ramsey Hairpin, Michael Dunlop had taken over the lead but it was still extremely tight; his advantage over Hillier just 0.09s. William Dunlop was a further 1.5s back in third as Johnson, Harrison and Hickman held onto their top six positions.
At half race distance, and coming into the pits for fuel, Dunlop’s lead had dwindled to 2.4s with a second lap speed of 126.015mph and it now looked like a two-horse race between him and Hillier. Ian Hutchinson who won Sunday’s Superbike race and was last year’s Supersport winner was in fifth.
The final 37.73 miles around the Mountain Course saw Dunlop finally pull clear and he eventually took the checkered flag by 13.2s. Hillier took his 10th TT podium in second with Hickman having another excellent ride and retaining third.
In the first sidecar race, Ben and Tom Birchall took a record-breaking Sure Formula Two Sidecar race win on Monday afternoon at the 2017 Isle of Man TT Races with the brothers taking their fifth TT victory and setting a new outright lap record of 117.119mph.
Their eventual winning margin over John Holden/Lee Cain was 25.6s with Dave Molyneux/Dan Sayle holding onto third as the weather closed in on the final lap. It was the Manxman’s 30th podium in his 50th TT start.