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Could smell burning and there was smoke coming from under the seat, took it to bits and the rectifier and plug have burned, is this a common fault? And is the problem the rectifier or has something made it do this?

Anyone?

well the reg/recs do fail fairly often, its not an uncommon fault...but its unusual for them to die so spectacularly on the zxr. i have seen other bikes where the reg/rec dies like yours has.

was there any indication it was bad, not charging correctly, lights getting brighter and dimmer (like a lot brighter/dimmer) when riding?

you will need a new one, and check eerything thats connected to the reg/rec to see if you have damaged anything else, the problem might lie somewhere else...the wiring diagram is in the manual, enjoy

you mentioned about 7 weeks ago that you had a flat battery, did you ever resolve why?

a few people suggested reg/rec then, did you swap it for a new one or did you just replace the battery?

Hi thanks for the reply, I replaced the battery and checked with a multi meter and all seemed fine until a couple weeks ago it went flat so I'd bump it and sometimes it would charge it and not other times.

What should my battery be reading whilst its running if I check it with a multimeter?

Just checked it on idle and it was reading 13.8v

bike turned off = >12V, should be at around 12.6V DC

bike at fast idle = ~14V DC

generator output at 4k rpm = ~45V AC

yours seems about right.

Cool hopefully it's sorted now, since I've had it I've put a new battery, rectifier,carb rubbers, chain and sprockets and cam chain tensioner!!! And I resprayed it. Hopefully no more issues as I'm doing my first ever track day at silverstone in 2 weeks