Z1000mk2 Exhaust port damage around valve guide

531blackbanshee wrote: it has the correct later model counter shaft cover on it tho :whistle: .

leon

nuwonder wrote: Hmm what do you mean, how can you tell it's different crank?

nuwonder wrote: Hey again guys, thought to post a little update as i got some more questions

I checked the cylinder head and it had no cracks, so I'm "safe" there. Gonna use it as it is, valve guides are not moving so all i gotta do is lap, put proper valve guide seals and rebuild the head and recheck for leaks. Not yet decided on the new rings for pistons, though.

I dug a little deeper to the alternator department, 'cos that old style cover thing you said got me thinking. Now I'm a bit bummed 'cos I found my stator was totally mangled and rotor didn't look too good either. Might explain why I had the digitial ignition meltdown. I'll include the pics below.

So stator had damage all around, deep worn grooves. Rotor was a bit better, it just has metal shavings from the stator in the pic so it looks worse than it is. I don't get why it has this kind of damage though? The difference between the pre 79 Z1000 and the MK2 alternator you pointed out got me thinking can it be possible that previous owner rebuilt older style alternator setup with rotor, stator and new cover to newer mk2 crank and that's why it didn't have proper clearance? Can it even be done? Or is that crank indeed from older KZ1000 and there is some other reason why the stator got crapped?

The electrics in the bike look terrible almost all around anyways , so many wires had worn all the way to the copper insides and rubbed to casings etc. I'm amazed it ran as good as it did.

So, what's the next move? I know I gotta replace the stator but how about the rotor? And how can I check I indeed have the old crank or new crank so I know what stuff I have to start looking for?