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Lynn clinched the Superbike crown for the first time in September for Banbridge-based team J McC Roofing Racing after an impressive season on the Kawasaki ZX-10 machine.

However, he still had to finish the job in the Supersport class at the Hillsborough Club’s end-of-year finale in County Down after a season-long battle with McAdoo Kawasaki’s Korie McGreevy.

Lynn held a comfortable advantage of 30 points over the Ballynahinch man going into the last round with 50 points up for grabs, with the outcome decided in Saturday’s opening race.

His fourth place on Jason McCaw’s Yamaha R6 combined with a DNF for McGreevy secured a fourth Ulster Supersport title for the 26-year-old, who went on to finish fifth in the second race.

“It’s job done and it took the pressure off for Sunday, so I decided not to ride the 600 and just concentrate on the big bike to see if we could run with the BSB lads,” said Lynn.

“It’s been a good year for us and I don’t know if there are many lads who have done it before; Alastair [Seeley] obviously did it previously [in 2021 and 2022] but in recent history, I don’t remember too many guys who have won both.

“It’s nice; the 600 championship has been crazy all year with Korie in it, so it was nice to finally nail it down and get it done and dusted.”

England’s Richard Cooper won Saturday’s Supersport races for a double on the BPE by Russell Racing Yamaha, twice beating fellow British Supersport race winner Tom Booth-Amos (Gearlink Kawasaki).

Both riders broke Glenn Irwin’s 2014 Supersport lap record, with Booth-Amos raising the bar with a time of 1m 07.072s (97.901mph) in Sunday’s non-championship race which he won narrowly from Eunan McGlinchey (EMR Yamaha).

Cooper and his BPE Yamaha team-mate Dean Harrison – third in Saturday’s two races – missed Sunday’s action due to prior commitments after the event was postponed by a day due to adverse weather on Friday.

Ulsterman Lynn is now hoping to finalise his plans for 2024 in the coming weeks after achieving his target of winning the Ulster Superbike title this year.

“At the minute we’re not really sure,” Lynn said. “There’s obviously a couple of things but I have to decide what I want to do and we’ll see in the next couple of weeks, and hopefully firm something up.

“The Superbike title was the target, it was the plan this year, and the 600 championship was just the icing on the cake because it was sort of a last-minute thing to do the whole season on the 600.”

Lynn qualified second for the Superbike races and recorded a best result of fourth in the opener on Saturday, followed by sixth in the second race and eighth in the 46th Sunflower Trophy showdown.

“It was awesome because we qualified second and we were sitting on the front row,” he said.

“I looked to my right and you’ve got someone who finished second in a British championship [Richard Kerr] and to my left, you had a world champion [Danny Kent].

“To be there in the mix with them in [Saturday’s] race and fighting with Charlie Nesbitt early on and then Danny Kent was nice.

"We’re a wee small team from Northern Ireland and it’s me and my dad in reality, so to be fighting along with the likes of those guys was phenomenal really.”

Jason Lynn hails Ulster Supersport title as 'icing on cake' after wrapping up championship double at Sunflower Trophy meeting