5.5 600 Superbike Engine displacement: four cylinders: 640cc or less, triples up to 680cc, twins up to 750cc, single cylinder – no restriction. Tires – DOT or slicks Must meet 5.3 Sportbike rules No external timing devices (Lap timers, Pit boards) Open to all Intermediate or Expert riders I was taking a read through the rules and noticed these two points in 600SBK. Why would these rules not mirror Superbike with a displacement cap? If your equipment must meet the Sportbike rules is this not just a longer 600SS race? And why would there be no lap timers in this race? I propose to change the rules to unlimited modification (except engine displacement) and remove the timing devices from section 5.5.