So, in theprocess of repairing my bike I purchased(from motobins.co.uk) a twin balance stainless exhaust to replace my rusty, leaky one. In all the rust, I missed the dimple in the pipe for the oil filter cover. Had to buy another one. So I have for sale a twin balance , NO DIMPLE, set of header pipes. My bike is an 1983 R100RT. I am asking 300$.