CafeDOHC
CB750 Member
I'm posting here to see if anyone has tips in helping me figure out my issue.
So my Cylinder 1 plug keeps fouling after a short period of time, I can hear my motor pinging
then the plug will foul. No oil or wetness on the plug when I pull it, just a lot of black carbon
build up preventing spark. New intake boots, CBR F2 plug wires and coil packs are functioning normally.
My idle is weird and is always different from ride to ride. The bike also has NGK Iridium plugs, K&N pod filters and a 4>1 exhaust
with 53E Primary needles. I pulled my carbs off and inspected the inside and all carbs are spotless, no varnish or discoloration,
newer unstained floats. Its definitely over fueling as the tip of my exhaust is also black with carbon build up and
it has the tell tail smell of extra rich unburnt fuel. This week I plan to check carb sync with a set of gauges as
the next step, but what am I missing? Any tips are welcome.
Thank you!
**Image of a brand new plug with 10 miles**
So my Cylinder 1 plug keeps fouling after a short period of time, I can hear my motor pinging
then the plug will foul. No oil or wetness on the plug when I pull it, just a lot of black carbon
build up preventing spark. New intake boots, CBR F2 plug wires and coil packs are functioning normally.
My idle is weird and is always different from ride to ride. The bike also has NGK Iridium plugs, K&N pod filters and a 4>1 exhaust
with 53E Primary needles. I pulled my carbs off and inspected the inside and all carbs are spotless, no varnish or discoloration,
newer unstained floats. Its definitely over fueling as the tip of my exhaust is also black with carbon build up and
it has the tell tail smell of extra rich unburnt fuel. This week I plan to check carb sync with a set of gauges as
the next step, but what am I missing? Any tips are welcome.
Thank you!
**Image of a brand new plug with 10 miles**