I've had this gpz500 for a couple of months, I think it's due a tappet adjustment as it has a bit of ticking from the top end but on tickover there's a lower pitched rattle.
It's a 1995 N 43,000 miles. newer model with 17" wheels and rear disc so it shouldn't be the shedding magnets model.
It goes OK, ticks over at 1100rpm, no smoke.
It could do with a service though I just changed the oil and filter which did quieten it down a bit.
I've never heard another one running so was wondering if twins are usually like this or should I carry a phone and an AA card at all times