2005 vrscb. So I had some work done over the winter. Larger gas tank new tires and rear brakes. Pick it up tonight and the rear axle slips out of place (whirr, kerchunk,chunk,chunk). What went wrong? The mechanic said he bolted the rear axle down with about 120 pounds of pressure and then 150 and it still moved. Wants to drill and tap a set screw in to keep it in place? In my mind the roddie is precision and no modifications should be necessary to put things back the way they were. Help!