I ride a VTX 1800. Took it to the track once. Had to ease it through 1st gear to keep it from spinning. Went 12.93 @ 101.
My brother, who races a dragster, has a 'busa that a friend races for him. It's been lowered, front strapped down, drag radial, exhaust, and shifter.
He wants to make some passes on it this year. It went 9.54.
The friend that races it owns 3 R1's. One he rides on the street. The 2nd is basically stock. He raced in streetbike class. The 3rd has a slick, wheelie bar, airshifter, and so on.
He has won 2 or 3 Wally's and a couple of track championships.