I have 1971 xs open pipes open air box it started leaking. Oil bottom of jugs so tore down an put all new gaskets in during that process noticed cam chain tensioner assembly was trash so got on eBay an. Found one but whe I got it it was off a 72 6 hole. No prob the 4 holes line up the other two are out of harm so put motor all back togather Fire it up an I have chater in top end checked specs again .006 front .003 in rear cam chain tensioner look to spec. I'm getting oil up there as well don't know where else to look. Thank for ur time