I have a CB400 and was out riding last week. I thought the bike was running low on fuel as the bike started to splutter. I have checked and there is fuel in the bike. Upon re-staring I noticed that the oil pressure light was faintly coming on. Then the right cylinder was misfiring almost dead. I let her cool down and tried again. The oil light is on and the right cylinder only works when not under pressure. When pulling away or going up hill the right cylinder is not firing at all, but re-starts when not under any load. My wife followed me home and said when the right cylinder does fire there is lots of blue smoke coming from it. I'm going to do a compression test today, but any ideas where I should start or what to look for?