1989 Yamaha XJ600
My pride and joy is a Yamaha XJ600 1989, pre-diversion obviously. I change the oil regularly but the engine has started making a ticking noise which seems to have got a little louder over the last six months and have noticed that cylinder two spark plug cap cover has started to vibrate a bit. The question is; is this likely to be something I can adjust to fix ,or could it be a serious internal engine problem? Oh and I don’t take the covers off the engine, but would do if essential. I have recently fitted a new Motad exhaust, not in the pic but I am sure it is not ‘blowing’. Firstly, it isn’t just the plug cap not fitting quite right and rattling is it? That is a good point about checking the exhaust as quite often a ticking such as you describe is nothing to do with bits of metal hitting each other but simply a release of high pressure exhaust gas at one of the exhaust ports. If you are sure that this is not the cause then it is most likely to be a valve clearance which needs attention, so I am afraid you will need to get those covers off this time.