And DucatisThe Factory HRC RC51 Superbike does not share one single bolt with the production version. Literally not one. Everything on the Superbike was different. Different frames, engine cases, heads you name it all the way down to the bolts that hold on the bar ends are different. The only thing they really have in common are the bore & stroke numbers of the engine.
The bike was successful because it had millions of dollars thrown at it to win at all costs and with that came a commensurate level horsepower and handling. Every Pro rider that rode an RC51 Superbike had excellent results on it. You didn't even have to be that good of a rider to win on the RC51 Zemke, Edwards, Hayden, even Kurtis Roberts won races on it and while they are all Pro Racers I would not consider any of them to be top level racers like the aliens of MotoGP. Don't forget that they were also racing against 750cc Inlines as well...
Do you know how they strengthened the cases?They didn’t share anything with the factory SPW’s but many privateer complete racer package SP’s did very well in competition around the world. Nearly all had different cranks, strengthened cases, rods, pistons and cams plus modified gearboxes. This on top of significant suspension upgrades.
Any bike with that much development and spend can be competitive. HRC helped out with fitting the SP1 race kit based items for the SP2 For homologation rules. Swingarm, forks, headstock, TB’s etc.