I bought my ZR-7S a few months ago and had to clean the carbs because the previous owner had it stored for a couple of years without starting it. So I got those cleaned as well as other issues and got it ride ready, but recently I was curious what the bike could do and went WOT in fifth but found I couldn't accelerate past 80mph and rpms wouldn't go over 9000. The bike already had a K&N air filter installed as well as a Muzzy's exhaust. So now I'm just curious as to what maintenance I can do to remedy this. Thanks.