Wow Lars that's very fast for a mono!! Must be a VERY light hull eh? Yes mine runs almost 100 knots(103mph with 1/3 load fuel). I bought a helmet as it's not fun to run those speeds without one. I keep at least 22 gal in the bow tank to ward off the dreaded 'porpoise'. I mostly cruise my lake at 55-70mph. The motor has to run at least 93 octane and at $2.40/gal it's just too expensive to run 80+ very often. But I love the boat it's a real attention getter and chick magnet. The guy I bought it from raced it, but now it's just a lake taxi taking bikinis to the Party cove.