Hello All,


Further to my recent post.... I am having an issue where my bike doesn't seem to be running on cylinders 2 or 3 at idle.  They seem to sometimes join in at higher RPM, but this seems to be hit and miss.  Sometimes they run fine and idle without issue, but this seems to be increasingly rare.

I have changed the coil packs for new items, which unfortunately has made no difference (I've checked the resistance of the primary and secondary windings and everything checks out ok), I have also changed the spark plugs.  I have checked the resistance of the spark plug caps and they are all OK.  I have disconnected the HT leads one by one and used an old spark plug earthed to the engine block to confirm that there is a spark at all cylinders, although it's possible (really hard to judge) that 2 and 3 are perhaps slightly weaker - but I'm not convinced, and there is definitely a spark.


Pulling off the HT leads one at a time shows that when I pull 2 or 3 off it makes no difference, whereas if I pull 1 or 4 if it won't run at all.


Does anyone have any ideas? I am now at a bit of a loss as to what to try next.   I am a little worried that perhaps the head gasket has blown between cylinders 2 and 3 (has anyone heard of this before?) but that doesn't really tie up with the fact that at first this was an intermittent issue.


Any help would be greatly appreciated!


Cheers!

Hello All,


As per my introduction thread, I've recently bought a '98 FZS-600. It's only got 4400 miles on the clock so clearly hasn't been used a huge amount in the previous 19 years.  For the most part it all seems to work fine, but it's a bit of a pig when changing up through the gears. 


Down shifting is fine, no issues there and I have no problem selecting neutral either but sometimes (not always, and it's possibly slightly worse once warm) it can be a real pig to change up. 1st to 2nd is fine, and 2nd to 3rd is OK, but 4th, 5th and 6th (seems to get worse the higher the gear) can be difficult to get into. It will go, but sometimes needs 2 or 3 attempts before it will shift.  Other times it will slot straight in without problem.


I've changed the oil and filter a couple of weeks back in the hope that it might have had crap oil in it, but this doesn't seem to have helped (it was a longshot!).  I have also adjusted the freeplay in the clutch, but again it doesn't seem to have made much difference.


I was originally hoping this might be an issue caused by a lack of use, but I've put a 150 miles on it in the last couple of weeks and it doesn't seem to have improved anything.


Does anyone have any idea what might be the problem?


Thanks!


James