I went to check out a bike yesterday, it was all good, ran well and revved freely (up to redline). However, two of the head cylinder side caps (LHS) are loose and a slow oil leak is coming out of the front one. Being a noob to the mechanical side of bikes, is this indiciative of something serious or costly to repair? It's a 1982 suzuki gs650 katana. Guilty caps are highlighted by red dots.