I have a 81 xj650. it's making some kind of 'noise' sounding like the cam chain tension has to be checked. I have a Haynes manual and it says to open up the crankshaft case on the 'left' but i'm not sure which one it is. I opened up the 'rear brake side' and there was nothing there. i'm assuming i'm looking at the crankcase shaft cover on the 'gear side'. also, can anyone give me instructions on how to do this? with pics? I'm reading the Haynes manual but it's a bit vague.