When I first rode my Rickman it had a KR76/KR73 combo....
With triangulars the first few times you rode with them it was a bit disconcerting that as you turned in they flopped onto the side of the tyre, but they were fine with a strong 850 motor...it was best to get on the power anyway.....changed the rear for a KR83, a curved profile 'intermediate', a bit softer and more grippy, and more even transition....KR76 still on front....lap times improved mainly as I got more used to it rather than a radical improvement in grip, but it was a better set up.....