I have an S&S carb and air cleaner mounted with 2 bolts that are blocking the crankcase breather holes on my 92 fatboy that are sealed up with gasket sealer. I bought the bike this way. Anyway, it seems like a bad idea to have the breathers blocked. Is there another way to vent the crankcase when these breathers are sealed up or is there a kit I can buy to vent the crankcase cleanly without making a mess that will work with the S&S air filter backing plate? I want to make sure my motor can breathe properly.

 

http://www.jokermachine.com/onlineca...p?CategoryID=7

 

If you do not have a top end breather set up then you should have a bottom end breather hose to atmosphere (road draft tube). Sometimes folks put a little filter on the end of the hose to catch the oil mist which requires occasional cleaning or they run the hose up to the air filter backing plate, in which case your engine will consume most of the oil mist and the balance of it will be collected by your air filter.
If you don't have any crankcase breather, you will experience poor engine performance, and there will be oil blowing out of the weakest oil seal/gasket the pressure can overcome (frequently the pushrod tube seals).