i have a '99 busa, needs a valve job tho (hear quite a bit of ticking)
i've run 10,500 rpm in 6th with stock (17/40) sprockets and that's all she had, held it for about 30 seconds hoping for more, felt pretty fast
last week i popped in 4 new ngk CR9EK plugs (brand new, were going into my still broken katana) these plugs are identical to the CR9E's that the busa takes, cept they have two electrode thingies on the bottom, dunno if this helps or hurts the busas performance, but it runs much better than with the 3 year old plugs that were in it.
at the same time i dropped the front sprocket down to a 16, cuz the company i ordered the sprocket from thought this was the stock size, and a stock 40 in back, as well as a new chain.
on my first big run with it, i hit 11,000 in sixth and the bike cut out hard, it got there sooo fast it wasn't funny, but it hit like a brick wall, scared me cuz i wasn't expecting a limiter or anything.
i brought the bike home, and stripped the fairing off the left side, and we found a lil hose (vaccuum line?) hanging down towards the valve cover, the hose is real small and soft, and we're now thinking this is why the bike cuts out at high rpm, and that is isn't a limiter in 6th.
so anyway, i have an 18 tooth front coming in this week, cuz the 16 is geared way too low for me, and at the same time we'll find out where that hose goes and if thats the prob.
anyone have a map of where all the hoses n stuff go, cuz make it a lil easier.