Question,'83 R100RT unknown km.(lots),new to me, carb clean-up. Left one normal,some crud around atomizing nozzle,installed new "O" rings. On right side, same crud,upon dissambly, I noticed ridges on bottom of slide where it is hitting the carb body.Quite hard as evidenced by flattened carb body and slide.Appears to be caused by a "pulsing", pounding caused by the slide.I did not run this bike much before starting work on it,so I have no history on a carb noise.On the few Bings I have worked on, I have never seen this. Causes and corrections? Thanks in advance.