I felt the same way at first. I ran my tires at lower pressure and that resulted in high speed wobble. Scary stuff. As soon as I put the pressure back up, no more high speed wobble. I now keep my tires at 36/40 with preload set at 8. I've lost some weight so I'm thinking of adjusting rear preload down to 7 or 6.
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Male, 44yrs, 180lbs, 5'9", '14 (RWB), 22k miles, Bridgestone BT023, Vortex V3 kit, Rotella T6, KN-204 filter, 87 Octane, Maxima Chain Wax, Puig 6479W windscreen, clear signal lenses, Fork Preload caps, T-Rex spools, Radiator guard, Shorty adjustable levers, Fork stem RAM mount/USB port, red/black alum grips, 300R Rear tire hugger, Rear seat cowl, LED engine/undertail lights w/RF remote, LED position light, Sea level, city commuter, spirited rider, turn my own wrenches.