Yup, after a year on a Fizzy (purple one, natch), I had a GT250M - the one with the Suzuki Ram Air System on it - all that appeared to do was make plug removal more difficult. Following a year on the meaty GT I passed my test and moved onto bigger 4-stroke UJMs for years. Before getting a car licence I did have a later GT250C (last one before the X7) as a winter bike - both GTs holed the right piston due to the points advancing, a task that needed regular attention, something that I obviously failed to do....
