In MotoGP, the cost is estimated at a cost of $2 million USD to product 1 SuperBike, not including the cost of research & development that also goes into the hundreds of millions. On Honda’s MotoGP machine, the engines cost around $220,000 USD. Yes, EXPENSIVE materials, lots of titanium, aluminum, magnesium and compacted carbon fiber. To keep the bikes light yet strong and durable to absorb shock and impact, from the engine to chassis to the fairings.
On Street Superbikes, production fairing is ABS (plastic), whereas MotoGP motorcycles use carbon fiber. The race machines also use carbon fiber-composite brake rotors as opposed to cast iron, which can often be found on street motorcycles.