I have used a Speed Triple, the first of the newer style ones. I was with a BMW/Kawasaki/Triumph dealer in 1998 - 2000. We went to Croft racetrack in the North of England to test the BMW R1100S (The new 'sports' BM at the time) and I spent most of the day on the Speed III which was there as a comparison. Loved the growl off the exhaust.
Beautiful, but SCARY on the back section of the track. We were briefed before going out and told to "get over to the right of the track and keep it wide open as the blind corner appears and it'll straighten out nicely" at well over 120mph on the approach I thought....

NO IT'S SOOOO

WRONG... but held it open and WOW... what a buzz, awesome experience.

I haven't used one since, unfortunately.