So, bought this bike,2007 v star 650 classic. 9500 miles. I put on new tires, changed all fluids, engine, final drive and brake and new pads, pod kit, new exhaust, synced carbs and now it runs great. I am having issues with buzzing, hands, pegs and seat in each gear when giving hard throttle. Then it cruises real good in 5th, about 50 mph nice and smooth, About 60 it comes back. Is this normal or do y'all have any ideas?