I asked Radical this question because I am considering replacing my Atom with one and they said it's rated to 80hrs if not racing. Also because it's a road engine it's supposed to get to temp fairly quickly as well?
Your SR10 looks fab. I’m running the Sports Prototype Cup ...we’ve got a Silverstone GP double header next Saturday 29th if you want to give it a race debut. James Bailey
Recommended engine refresh for SR10 is 80 hours at race pace, 100 hours for track day use, I did hear that a 90 hour test engine was stripped recently with no signs of wear to the internals.