Funny you brought this up, I just did it about 3 hrs ago, I was out riding, minding my own business doing about 65 down a 60 mph road when a harley came up beside me and gave me the roar, I let him pass me, then caught back up, He roared again and took off, I met up with him at the next light, pulled up beside him and asked if he wanted to see what he could do againt the fasted bike made, He laughed and gave me another roar, I gave him a roar right back, When the light turned green he took off with all his might, Once I realized he wanted to see what he could do, I jumped on it and went around him like all hell had broke loose, Took it up to 160 and when I couldnt see him in the rear veiw mirror I slowed down, let him catch up, as he passed me he gave me nod as I was taking the next exit. LESSON LEARNED...