76 kz900 Overheating

Burnt fuel.

Running that rich how is it overheating?
Steve

Maybe it's not overheating, I turned down the I turned on the pilot fuel screw from 2 turns out to 1 turn out readjusted the air screw got it to stop popping and now it will run with the choke fully off (progress) tomorrow I will change the spark plugs.

Hey guys with the modifications I have on my bike should I be using stock spark plugs something else.

76 Kz900 A4 custom
New front forks
mono shock swingarm
73mm piston kit - 1105cc
Dyna s ignition & coils
Pods
Vance & Hides exhaust with baffle
Suzuki gs1000 VM28 carbs
Main jet - 130
Pilot jet - 17.5
Air Jet - 2.0
Needle 5DL31 - 4
Float bowl height - 26mm
Air screw - 3/4 turns out
Pilot fuel screw - 1 turns out

Thanks

Original spark plugs are fine....carbs need work tho by the look of the picture you post of the plug.
You using original carbs or other type?

I'll say it again it's not overheating.

Never overheating.
Overheating = lean fuel to air mixture
Your spark plug looks like the opposite, really fat fuel to air mixture = unburnt fuel
It could be a problem with your choke enricher circuit

Suzuki gs1000 carbs from a 1979