Black powder in my motor

I just picked up a 78-79 KZ1000. I removed the exhaust and have found a large amount of black dust, which I assume is carbon or oil burn build up. Is this correct? If so what do I have to do to fix it?

....must...not..do..a..Gris...must..not...light...match...must..do...Gort's...comman... :blink:

Sorry. Couldn't resist - the header made me do it...

You didn't mention how *much* dust "a large amount" - an ounce? A pound?

How many miles on the machine?

Sounds like it ran reallyreally rich for awhile, and may have exhaust valve issues.

While it isn't a "correct" condition for the motor, it isn't outright proof of a terminal flaw in its own right, short of some other specifics...

give it a good stif tuneup,then take it out and run the hell out of keeping it wound pretty tight in the lower gears as you go through them that will blow a lot of carbon out,look for little flaming fireballs out the exhuast if ya do it at night!:evil:

Wireman ya gotta quit doing that!!!!!:blink: :S :dry: :blink:

Yea.Yea.Yea.yea....Flamin Balls of FIRE out of pipes!!!!!! HOOOORAYYYY!!! Fire Fire Fire....oops:blush: sorry guys!!!!!:evil: :evil:

LOL, I didn't even think about the connotation that might give funny. Now that you mention it the carb settings were set quite rich when I got it, and my plugs showed that. I have yet to rebuild the carb (parts held up) so once that is done I will ride it hard for a bit. I did notice with the old carb settings and orig. oil at the decel I would get a puff of blue. It seems to be a strong motor (not as fast as I thought) but it is smooth on the take up.