In scorching conditions around the 8.9-mile ‘Triangle’ course, Irwin and Milwaukee BMW’s Davey Todd engaged in a repeat of their battle in Thursday’s opening race, which went down to the sixth and final lap.
With nothing between them, Todd was lining up a pass as they approached Juniper chicane but a slower rider skittled his tactics, preventing the 28-year-old from executing his plan.
That left Hager PBM Ducati’s Irwin to clinch an historic win by 0.382s for a double following his victory in Thursday’s race.
Michael Dunlop finished third on his Hawk Racing Honda, 19 seconds down, despite incurring a 10-second time penalty after failing to stop when he ran on at Magherabuoy chicane on the first lap.
Irwin wrapped up his 10th Superbike victory in a row and his seventh on Ducati machinery to take over as the most successful rider ever in the blue riband class from Joey Dunlop and Michael Rutter.
![Glenn Irwin celebrates his record-breaking North West 200 win with partner Laura and kids Freddie, Gia & Phoebe](https://www.northernirelandworld.com/webimg/b25lY21zOjBmNDEzMzJlLTMzYWMtNDZmYy05YWM4LTMxZWI5OTYzNTlmZDoyNjY2Nzg4ZC02NTQ2LTQ0NjgtYmI1My01ZDU5Y2FmMzk4MjA=.jpg?crop=3:2&width=800)
1. Special moment
Glenn Irwin celebrates his record-breaking North West 200 win with partner Laura and kids Freddie, Gia & Phoebe Photo: Stephen Davison/Pacemaker Press
![Glenn Irwin celebrates after his 10th consecutive Superbike win following Saturday's triumph at the North West 200. PIC: Stephen Davison/Pacemaker Press](https://www.northernirelandworld.com/webimg/b25lY21zOjYyMzU3NzQ0LTAzYzEtNDFmYS1hMTlkLWUyZWI3YjZjNzNkZDo2YzYzNTA5ZC1iYTkxLTRiYmUtOTRjMi00MDM2OGJkNTA1MDE=.jpg?crop=3:2&width=800)
2. History-maker Glenn Irwin
Glenn Irwin celebrates after his 10th consecutive Superbike win following Saturday's triumph at the North West 200. PIC: Stephen Davison/Pacemaker Press Photo: Stephen Davison/Pacemaker Press
![Glenn Irwin celebrates after his latest North West 200 victory](https://www.northernirelandworld.com/webimg/b25lY21zOjZiY2U0YmU3LWQwOGMtNDZhZi1hMjFkLTAxMmNhMGVjNjA4MDozYzRmZjcwNy0wM2Q0LTQ0NjUtOTFiMi1jNzM4ZmRlYjEzYzc=.jpg?crop=3:2&width=800)
3. Winning moment
Glenn Irwin celebrates after his latest North West 200 victory Photo: Stephen Davison/Pacemaker Press
![Glenn Irwin jumps for joy after winning at the North West 200](https://www.northernirelandworld.com/webimg/b25lY21zOjAwNDg5OGFkLTNhNTctNDM5MS05YTZiLTVkMWE1YTUxN2Q5Nzo4Y2EzNGI3ZS0zMDZlLTRmYjItODU3Yi04ODdhMDcxN2VlMGI=.jpg?crop=3:2&width=800)
4. Jumping for joy
Glenn Irwin jumps for joy after winning at the North West 200 Photo: Stephen Davison/Pacemaker Press