ive got the goodyear f1s on myn and ther brilliant.
and i can recomend the 24v no end. YBs have been an gone around me and my old 24v p100 still goes strong.
cant get over it. gets warmed up an ragged most days and its had an oil change every 6k and theres not even as much as a slight haze when it fired up cold. still like new.
my friend has one with 270,000 miles on it and he still plants it at 150mph down the 'private road' happily without a problem.
just had camchain and oil pump etc every 80K