Brandon Paasch took early control of the Hel Performance British Motostar class as he made a clean sweep of Oulton Park.
The FPW KTM rider made his return to the series with two wins on the trot as he dominated in Cheshire.
Series rookie Dan Jones got a lightning start from pole position in race one, but after a crash at Shell Oils on the opening lap, Paasch inherited the lead.
The American began stretching a gap as Microlise Cresswell Racing’s Asher Durham and Jack Nixon diced for second, with reigning Standard class champ Victor Rodriguez hot on their heels.
Durham edged ahead of Nixon on lap two and started chopping down Paasch’s advantage, while Rodriguez ran off at the exit of Island Bend and was forced to retire from third.
But despite knocking his lead down to just over 0.6s, Durham lost out to IFS rider Scott Swann and Santander Salt’s Jack Nixon in the closing stages while Paasch, two seconds up the road, took his maiden win.
Back in the Standard class battle, it was an all-British Talent Cup rider podium as Nova Racing’s Cameron Horsman fended off Premium Motorhomes’ Scott Ogden for the Standard class win, while Banks Racing teen Charlie Farrer took third.
In race two, Nixon flew off the line and straight into the lead from third on the grid, leading Paasch and pole-sitter Swann as the scrap got underway.
But Swann soon found his way past Paasch before City Lifting/RS Racing’s Jones swept right past both of them at Island to take over second place.
Nixon’s race was over, however, after he dumped his bike at Druids, leaving Jones, Paasch and Swann to move into the podium positions.
Paasch reeled in Jones with three laps completed and slipped ahead on lap five, but the three were stuck together for much of the 14-lap scrap.
Jones and Swann swapped places as the race crossed the half-way point, but neither lost touch with the American as they both looked for a way through.
After clawing back his deficit, Durham caught up to the leading trio and sneaked past Swann for third on the penultimate lap.
And despite a backmarker battle, Paasch emerged victorious to do the double ahead of Jones and Swann.
In the battle for Standard class honours, Ogden beat Horsman and Farrer to the top spot following a tussle with some of the full Motostar machines, including Jamie Davis.