I've only had my 850 xp for a week as of today. I have to drive up the road about 100 yards to get to the trails. I only go about 25 mph to get to the trail. While i drive up the road the bike slightly bouces up and down as if the tire is out of round or out of balance. Has anyone else noticed this. I even tried a different section of road to make sure but with the same result.