I have a 2014 Viking. It has started vibrating and has a hard time powering through from 30-40 mph. It has 3500 miles. I replaced the belt and noticed the weights in the primary had flat spots. I replaced the weights and sliders and applied new Yamaha grease. I thought for sure the problem would be fixed. It is not. It will do it under load 3/4 throttle. When u hit 40 mph itís like nothing is wrong. When it does it it feels like u hit a rev limiter and vibrates. Any help would be awesome.