I have an 89 FLHS that has a leaking rocker cover at the bottom seal on the rear cylinder. Should I only work on the leaking cylinder or go ahead and do both? I have been thinking of polishing them both anyway. Also, while I am in there is there anything else I should do at the same time?

 

If you're going to polish, do both. If you want to ride it, fix the one that is leaking. (If it's not broke, don't fix it.)

 

If you want to wait till winter there is a product called Mega Gray (import gasket maker ) made by Versachem sold at most auto stores What you do is clean the area around the leak with brake clean and a toothbrush apply the Mega around the area let it sit for 12 plus hours than take off I did this 2 years ago on my 93 FLHS still holding I also did the base gasket area Great stuff and it is the color (somewhat ) of your motor If you do replace the gaskets use HD's latest or Cometic or James