Spark plug problems

Hello KZ Riders,

if any one know what going on my kz1000.

I change the carburetor to a New one (Murrays Carbs) and a still have the same problem with the sprkplug. 

Im using Motogadget M unit , New coils 3ohm, New regulator and New stator .

This is how my sparkplugs end  of a couple of short rides 




 

Either very rich, burning oil or weak spark. As you have changed carbs without it changing the symptoms burning oil or weak spark is likely unless they are very cool plugs.

What spark plugs and what grade are they?
Are you getting any smoke from the exhaust.
have you checked spark gap and power to the coils?

The look like Champions.

ugh!

Better off sticking with recommended NGK or ND.

Hello, they are champions N11, is the best i can find here.

I have poor smooke sometimes 
 

Champion plugs seem fine in a car but I always found them pretty poor  in any motorcycle. Not saying they are the cause of you problem but lets see what others have to say.
I dont know what ngk plugs are recommended for the kz1000 so cant say what the Champion equiv would be.

do you have a multimeter to check power to the coils? With ignition on and meter on DC volts put red probe on red wire at the coil an black probe to earth  ie  motor or frame.
Voltage should be close to or just s bit lower than that of the battery

 

What brand and model are the carburetors? What jets are in them? Have you checked the fuel level in each carburetor?

I fixed your pics. Click insert all next time. Could be old valve guide seals. 
Steve

What am I missing here. The first two photos show 4 plugs that that look very rich but none have the electrode and the earth strap bridged. Then in photos 3&4 you show a plug that is nothing like the first four. In forty plus years of being a backyard mechanic I have never seen a plug with the electrode bridged to the earth strap, let alone have that happen in a “couple of short rides”. Please show us the most recent set of plug and there condition. 

NGK B8ES is the factory recommended plugs. Or Nippon Denso W24ES-U

Did you talk with Murray’s about your bike to get the jetting correct before purchase?

N11's are pretty hot.  Carbon soot that heavy after "a couple of short rides" point to jetting.  Also, confirm full battery voltage to the coil primaries per JR's suggestion.

Good Ridin'
slmjim & Z1BEBE

Had the same thing happen when I switched to Murray Carb setup.

I called him and he told me the carbs run rich at idle and will improve with RPM.

So far this hasn't been true. But I haven't had the bike up past 40 MPH so... maybe?


Still have the stock carbs?

Think outside the box on jetting 
Age and condition of valve guide seals  (remember Smoking  stated )
I experienced this condition 
Dave