My 08 18 HPN with 2013 Motor Trike has a vibration that tingles hands and feet. It is very noticeable when accelerating with tach below 2500. The vibration seems to stop above 2500. It doesn't mater what gear you are in. The vibration is very strong from 2100 -2500. It also smooths out when you level off and stop accelerating. All suggestions will be appreciated.