When you report a top end speed, is this done under the best conditions, light load, one person, empty livewells, 1/4 tank of gas etc? I have yet to see 69-70 mph out my TRX 18 with pro xs 200 4 stroke. I keep reading and hearing about it and most people are shocked to hear that I have not reached that speed. If I take an average, based on conditions of load, air temp, water temp, I can say that I average around 65-66 mph.