Sigma Performance Slipper clutches in the 2025 Pirelli National Sportbike Championship.

It’s been a great start to 2025 in the Pirelli National Sportbike Championship that runs as part of the British Superbikes in the UK.

Sigma performance has got a full range of clutches for bikes eligible in this class and has seen some very pleasing results in the first few rounds.

At the first race at Oulton Park Rhys Stevenson was on pole, set the fastest lap and finished on the podium. Harrison Dessoy was alongside him and finished second. Both riders are on Triumph 660 machines.

Fast forward to Knockhill earlier this month and in the three races we have three riders regularly in the top six.

Asher Durham, on his Suzuki 800, in only his second meeting with the new clutch, won one Race and also set the fastest lap. In the other races he scored a third and fourth. Alfie Davidson on his Aprilia RS 660 got himself into pole position, set the fastest lap and scored a pair of podium finishes. Harrison Dessoy also got three finishes in the top six.

As the series moves towards Brands Hatch, this leaves Harrison Dessoy in third place in the championship, Asher Durham in fourth and Alfie Davidson is sixth.

We have clutches for all the bikes eligible for the series… any questions .. just drop us an email.

Full details of our range of clutches are available via our website ..

www Sigmaperformance.co.uk.