Hey Ken, I have a Honda so I don't have quite the vibration you do but I still check every so often to see what has come loose. Bazooka or one of the Champion riders on here can tell you if there is a time or mileage figure to go by. I normally do it on rainy days in the garage just "piddling" as I call it. Check the lights, lugnuts, shoot a little grease on the u-joints...