I researched about how to adjust the prymary chain on my buell firebolt 2004.and of course the chain was loose and most of the oil was missing,because of lack of maintenance from the last owner.I adjusted the prymary and changed the oil,now the bad noises are gone ,but I didnt ride it because when I put the new oil in it,I hope I did the right thing.There is a round access cover and a forward small square access cover.I pour the 32 oz.in both ports think all the space is interconected.Please forgive my ignorance.Im still waiting for the service manual.Please let me know if made a mistake.