2025-03-19 Kz1300 Spark Plugs

2025-03-19 Spark Plug Check

Noticed yesterday on ride that she seemed a bit lean at near full rpm e.g. main jet circugit.

Pulled plug for a look.

Cylinder 1 is far and away the worst looking plug. Not sure why it's black around diameter.
Oil consumption has dropped to *nearly* zero, but me thinks cylinder is the burner.

1-6, L to R.

From my POV, 4 is optimal followed by 6. Worse is 1, 3.

Another lineup, with electrodes reversed.

Thinking about running a slightly colder plug, BP8ES on 2 - 6.

Of course, this is running around at sea level, and pretty sure this motorcycle will never receive death Valley or lower elevations. Still, I sure don't want a hole or piston.

Note: Stock jetting, but 6-1 DG Exhaust.