(24-10-25, 10:47 AM)Fazered Wrote: Surely if it was the leads or plugs themselves then I wouldn't see arcing from the cap cover?
Nope you'd still see it. Assuming there not all arching? Have you tried swapping the plug from one that isn't, into the cylinder that is arching? If with plug from a cylinder that isn't arching in there and it doesn't arch it's not the lead/cap, it was the plug. Than try swapping the cap that is arching into a cylinder that isn't if it's not longer arching, it's the lead or the connection to the cap. That latter is a well known fault. If it's still arching it's the cap.
FZSs are getting long in the tooth now so it's not surprising things are getting hard to find.
All you need do is measure the length of the current cap and look HERE for a very close match you need plug size 10/12mm and 5kohm. Get the code and find a cap try HERE and HERE for starters they're are many more you've just go to look. It doesn't matter what bike just that the specs match. You may have to go for straight and they'll be pushed further into the head, which will probably mean you'll need longer HT leads and careful use of covered jaw pliers to remove them.
Later