Theres no way thats a genuine 176mph, the bike reaches the top speed far too quick after he overtakes the other one and he turns it far too easy, he's defintly flat out in 6th gear though, you can count the gear changes from the start of the video. I reckon he must have a much bigger than standard rear sprocket to get the speedo reading that speed. My mate has a gsxr with a 57 tooth rear sprocket which he can get to say 186mph on the speedo everytime he goes out when in reality it actually only reaches a top speed of 117mph!