Do these look normal?

[Grdate]

The mower runs great, just a puff of black smoke on cold and hot starts. I have started raising throttle position to 75% during cold starts to allow a quicker volume of air to enter once the choke is set to 0% after the engine hits

 

[Grdate]

I have ordered leaner jets, #131 and #137, and will see if the problem still exist. I would love to adjust the idle mixture screw, but you know they would limit access with a plug.

 

[Grdate]

Just did the “tune up kit” to my 2020 super z with the Kawasaki FX1000V with 50 hours. Changed my spark plugs and the original ones look like they’re running rich in my opinion. Pic included. Is this normal for these?

Problem solved on a FX921. Apparently 93 ethanol free fuel is too slow and cool of a burn for this engine. Switched to 87, just as the Kawasaki manual states, and no more fouled plugs.