Callum Collister and Ryan Cringle shared two wins apiece in the main solo races in the latest meeting hosted by Andreas Racing Association at Jurby Motodrome in the north-west of the Isle of Man on Sunday.
Cringle crashed his recently acquired Triumph 675 in the opening ACU Centre championship race shortly after taking the lead from Andrew Dudgeon.
Collister quickly fought his way to the front and won the race by 2.67 seconds from Mikey Evans and Dudgeon.
Collister also won the first 600cc race from the same two riders, smashing his own lap record in the process.
Cringle got his Triumph triple back on the road for the second Centre championship race and won that by a fairly comfortable margin of three seconds from Collister who nevertheless extended his lead in the title chase with a first and a second.
Cringle also won the second 600cc race. Once again the more consistent Collister is in charge overall.
Dudgeon came away with a full-house of four wins from the Single, Twin, Triple and 650 twin races, while there were record galore in the near-prefect conditions for Dudgeon (Single, Twin, Triple) and Jack Hunter (Post Classic), together with Ian Raybon (125cc) and Ed Poole (Classic).