Looking for help/advise on my 78 Shovel. I'm running a 3" open belt drive Karata set up. The issue i'm having is that the belt isnt staying alligned properly. It keeps walking intoward the clutch hub. and rides about 1/8" off of the hub. I've tried shimming the front sproket out, adjusting tranny. If i line the belt up centered on the hub, it walk inward just from kicking it over. Any suggestions.