sdew99
CB750 Enthusiast
Ok thanks for the help. Going to make sure that cylinder isn't running rich still and go from there
Update.. ran the bike today with the new plugs, and within 5 minutes this what the plug looked like.Less jet will hurt for sure. With the different exhaust it might run better with more than stock, not less. If you have the plug fouling on one cylinder fixed then you might be better off with more jet.
Checked the valves clearances and they were between 4 and 6 thou.Update.. ran the bike today with the new plugs, and within 5 minutes this what the plug looked like.
How is this possible? Lol. All other plugs look perfect.
Unless it burned during combustion. Leaving a black residue behind. If it dumped oil, I would say yes.Shouldn't the plug be somewhat wet if it's oil?
Ok.. I am mindboggled. Canada calls for resistor type plug but other places don't?Ok thanks. Jets are indeed stock, float height in that carb is 15.5mm.
I really hope this is a stupid question, but these are supposed to have ngk dr8ea not d8ea plugs right?
What was all done during the service? So the bike only runs on cylinders 2&3 till it warms up? Could be a number of things, low compression, valve adjustment, 1&4 flooding? Don't rule out the carbs just because they were worked on in the past. You might want to start your own thread on the subject.Just did a full service and re did the carbs like under a year ago.
Not yet. Hoping to get to it tonight.. I was having the same problem and I think my plugs were so carboned up they wouldn't spark.Any updates?
I am having the same problem on my 82 750k. Just did a full service and re did the carbs like under a year ago. Not only am I having the same fouling problem but as of two days ago cylinders 1&4 only fire one the bike gets hot. I'm at a loss
I did oil plus filters. New cdi units and new spark plugs. Day of the service she ran like a dream then I did a 30km ride and the next day this cylinder issue started.What was all done during the service? So the bike only runs on cylinders 2&3 till it warms up? Could be a number of things, low compression, valve adjustment, 1&4 flooding? Don't rule out the carbs just because they were worked on in the past. You might want to start your own thread on the subject.
Have you tried to keep her running? I only found out about the temp Parr once she was running got a bit and I could hear 1&4 start to fire here and there. Then a huge backfire shat Myself and she was running fineNot yet. Hoping to get to it tonight.. I was having the same problem and I think my plugs were so carboned up they wouldn't spark.
Put new ones in and it was day and night... except for cylinder 4 that fouls instantly.
What was the problem that time? What brand of parts did you use?New cdi units and new spark plugs.