I just bought a new 2016 ZX250 with a 250 Yamaha Sho. After the initial break in on the motor I finally was able to get it up to 73MPH and noticed the steering was very stiff at high speeds. Is this normal? The steering at anything below 60mph was fine. This is the 1st boat I have owned with this much horse power so I want to make sure something isn't wrong.