The bike red lines in top...and gets there pretty quickly. I've played with stock busa's and I've never known one with 'stock everything' capable of hitting the rev limiter in 6, but they still manage to pull big speeds (180+mph)...mine will rev up there in top as it does have an awful lot more torque and hp and less weight to get there and even though the aerodynamics are not super slippery...it is good for 200mph+.. allegedly officer. Same engine and turbo unit in something longer with the boost wound up a little would easily go another 20-30mph quicker...after that it requires serious aerodynamics and major hp to start pushing something through the air much quicker... down force can actually hinder top speed once you start pushing past 125mph. Given the wheelbase and weight and the fact you can provoke its front wheel in the air in 5-6 I'll take all the down force I can get!!!