There are some brands of bicycles that can cost more than the down payment on a car. Why? Surely making a bike lightweight and reliable isn’t so difficult that it warrants that price? Is it just the brand name or maybe it has to do with customization options?
Superbike championships use road bikes with a change of fairings and upgrades to things like exhaust, brakes, and suspension.
Hell, Isle Of Man TT lightweight class has used stuff like the ER6f as a base which is a budget commuter bike, lol
A halo model super sport is basically a street legal race bike.
Remember when NASCAR racing meant “stock” car racing? Me neither.
Poor camparison, Superbike championship and the TT etc use the frame and engine (and quite a few other bits too). A stock bike in the right hands can get reasonably close to their lap times, and one with light mods (say, €1000 extra and a bit of elbow grease) can be halfway between the two.