Carrickfergus man Alastair Seeley took a thrilling victory on his Relentless TAS Suzuki in Monday's British Supersport race at Brands Hatch.
Seeley crashed out on lap six of the opening race of the series on Sunday and lies fourth in the championship.
Michael Laverty crashed out of the first British Superbike race while leading, with John Laverty and Ian Lowry also coming off during the race.
Michael Laverty recovered to finish in fourth place in Superbike race two.
Glenn Irwin was sixth in Superstock 600 and Lee Johnston sixth in Supersports.
Portadown rider Marshall Neill, the reigning Irish Superbike champion, finished seventh in the Superstock 1000 event, with Gerard Kinghan 17th.
Johnston had taken fourth in Sunday's Supersport opener.
Seeley won a titanic tussle with runner-up Jack Kennedy and third-placed finisher Steve Plater in Monday's race.
"I have gelled with this new Suzuki from the moment I sat on it and it's good to get some points on the board ahead of the next round at Oulton Park," said Seeley.
John Laverty lost the tip of a finger following his crash in Superbike race one, which was won by Shane Byrne from Tommy Hill.
Hill won race two from Ryuichi Kiyonari and Byrne.