1 Sooty spsrk plug Tue Apr 05, 2011 4:33 am
redman
active member
I've noticed that on my 85 K100RS that the #4 spark plug is very sooty compared to the rest. The others all look white. I'm thinking that this is a rich condition possibly caused by incomplete fuel atomization from the injector. Or maybe low compression?
Also of note when trying to solve a rough idle, I sprayed brake kleen on the #4 intake boot. It made no immediate difference but it seemed that the solvent eventually soaked through the intake boot & the engine ran very smooth until all the brake kleen was exhausted.
Thoughts?
Also of note when trying to solve a rough idle, I sprayed brake kleen on the #4 intake boot. It made no immediate difference but it seemed that the solvent eventually soaked through the intake boot & the engine ran very smooth until all the brake kleen was exhausted.
Thoughts?