Jamie Hamilton sustained a suspected shoulder injury after the Wilson Craig Honda rider crashed out of the Grand Final at the AXA Bikecare Skerries 100.
Hamilton, who had clinched a double in the Open and Supertwin races, came off at the chicane on the final lap, bringing out the red flags.
Manx rider Dan Kneen was declared the winner on John Burrows’ Cookstown B.E. Racing Suzuki ahead of Skerries man Michael Sweeney and Derek Sheils on the CD Racing Kawasaki.
The incident is a blow to Ballyclare rider Hamilton, with the Wilson Craig Honda rider due to compete at the Southern 100 at Billown on the Isle of Man next week.
The 23-year-old maintained his brilliant form from the Bush meeting last weekend – where Hamilton won four times – as he began the day with a win in the Open race.
Hamilton’s advantage at the line was one and a half seconds over Sheils, with Sweeney taking third.
Grid positions were based on championship points after yesterday’s practice was held under controlled conditions due to wet roads.
There were no such problems today though, as massive crowds basked in warm sunshine for much of the day.
William Dunlop made a successful return to racing following his crash in the Senior race at the Isle of Man TT, passing Derek McGee and Hamilton to take the lead of the Supersport race and pulling away to win with six seconds in hand on the Tyco Suzuki GSX-R600.
Dunlop didn’t have the 1000cc Superbike at Skerries, but the Ballymoney man will be reunited with the machine for the Southern 100.
McGee crashed out at Finnegan Corner on the first lap of the Supertwin race, which Hamilton went on to win by 13 seconds on Robbie Silvester’s Kawasaki.
Connor Behan from Cheshire finished as the runner-up on the KMR SGS International Kawasaki, with Czech rider Michael Dokoupil finishing in the podium in third.
Dungannon’s Nigel Moore won the 125cc race from Sam Dunlop and William Cowden, which was re-started over four laps after a crash involving
Warren Reeve, who escaped relatively unscathed.
Seamus Elliott won the Moto450 class. Moore also won the earlier Classic 350cc race to bag a brace.
Thomas Maxwell from Mullingar suffered a suspected broken ankle after crashing in the Senior Support race.
Neil Lyons took the win on the Amigo Yamaha R6, while Derek Costello was victorious in the Junior Support race.
Sweeney missed the chance of a win in front of his home fans after he came off in the 250cc race on the final lap while battling for the lead with Elliott.
The race was stopped and Elliott was declared the winner from John Ella by seven seconds.
There’s no let-up in the action as Walderstown in Co Meath hosts the next Irish national road race of the summer next Sunday.
AXA Bikecare Skerries 100 results:Grand Final: 1 D Kneen, 2 M Sweeney, 3 D Sheils, 4 D Morgan, 5 S Elliott, 6 J Walsh, 7 A Farrell, 8 S Egan, 9 A Connor, 10 J Kelly.
Supersport 600: 1 W Dunlop, 2 D McGee, 3 J Hamilton, 4 M Sweeney, 5 D Sheils, 6 A Farrell, 7 S Elliott, 8 J Kelly.
Open: 1 J Hamilton, 2 D Sheils, 3 M Sweeney, 4 D Morgan, 5 D Kneen, 6 D McGee, 8 J Walsh, 9 S Elliott, 10 A Farrell.
Supertwin 650: 1 J Hamilton, 2 C Behan, 3 M Dokoupil, 4 A Farrell, 5 D Kneen, 6 S Egan.
Senior Support: 1 N Lyons, 2 N Carroll, 3 S Proctor, 4 B Merrigan, 5 N Kernohan, 6 G Kennedy.
250GP: 1 S Elliott, 2 J Ella, 3 N Kernohan, 4 T Henry. (SS400): 1 D Howard, 2 M Shiels, 3 V Allan, 4 B Merrigan.125GP: 1 N Moore, 2 S Dunlop, 3 W Cowden, 4 S Leonard. (Moto450) 1 S Elliott.
Junior Classic: (250cc) 1 P Shaw, 2 A Jackson, 3 G Hutton. (350cc) 1 N Moore, 2 B Davidson, 3 R Lambourne.
Junior Support: 1 D Costello, 2 S Connolly, 3 N Bertram, 4 M Hollingsworth, 5 R Wilson, 6 T Whitmore.