Yes. I drag raced a road legal (not saying which road mind you! :) Suzuki X7. If you go to the Gallery tab next to the Home tab at the top of the page, there is a photo of a photo in the section Old and next generation.
The bike was bought stock and put into 3 piles, engine, frame & wheels, & Junk!! The engine was re-bored to take TS125 1st over size pistons, to take it to 271cc, S&B air filters, Hy-tech competition reeds, 2 base gaskets & the head gasket was split into 5 sleeves and 2 replaced, 102.5main jets, & modified Micron expansion chambers.
The seat was off a TZ350 race bike with home made padding! Rear light was from an original Triumph Tiger. Micron ace bars. KH400 clocks, & head lights were a pair of Halford spot/fog lights with 120w high beam/80w low beam. It also had a Kawasaki 7 point steering damper just to be sensible!
I think that was it!! It ran 12.96 at Long Marston (Avon Parkway)
I also had a series of smaller learner bikes (RS100, GP100, briefly a AP100 & Ive even got a YB100 in the garage waiting to be used as a donor bike for an off road buggy project that I WILL get round to one day!! : ... in theory!)