Yesterday, I did about 400 miles with some friends of mine. I noticed a feint vibration on the handles when I reach about 71 MPH. It stays there until 76 MPH than goes away. It was not the road condition. Did that on any road even perfectly paved highway. The vehicle did not pull either way, just straight. Checked the tire pressure and all have the correct pressure. The bike is about 2 weeks old. So basically, it does that at a specific speed. Should I be concerned? I m due for the first service next week.