87 FZR 1k and I finally got a chance to spend alittle time together after she sat for a couple of weeks. When I started her up on the the choke the exhaust seemed "muffled". I thought it was maybe from sitting and blow her alittle. The "muffled" and slight "fludder" never went away and can't reach a speed over 75mph, feels like theres no fuel. Drained tank, put fresh gas in just to be sure and same thing. New fuel filter, and petcocks. Is it time for a carb rebuild?