I have an 03 supersport 550 and my top speed last year was only like 80 on speedo. i went beside my buddys F7 and he said digital was reading like 72. but that was in powder...... I found out over the summer polariss jetted the fat from the factory so mine was getting a little too much gas between 10-30 degrees. I put a AAEN pipe on and an EPI trail clutch kit so ill have to wait and see what it does this winter. The pipe should lean it out a little so it should go better than it did last year. Im thinkn 90-95.