I had emailed Kerry last year, to ask about their experience with changing to heavy duty clutch components. (resulted in snapped chains, so back to stock springs)
He indicated that the 200hp lc8/nitro powered bike is for the US and the RC8 was for the European tour, since Nitro is very controlled in Europe. The LC8 motor has no internal mods, other than what it took to add the Hilborne injector system. The LC8 motor is still running its original stock pistons/rods/crank/cyls/heads, after four years of racing it, no plans to rebuild for the next(2012) season.