The easiest way to prime an XBR from my experience is to first fill the oil tank, then remove the small bolt located just forward and below the kick starter, on clutch cover, remove one of the tappet covers and pour oil into this until oil starts to come out of the bolt hole on the clutch cover. Replace the bolt and tighten. Next loosen the oil pipe at the head and kick the bike over until oil starts coming out, Tighten the oil pipe banjo job done. (It can take a lot of kicks to get the oil flowing)