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back firing
Posted: Wed Sep 10, 2008 7:46 pm
by DevonCbx
I pulled my plugs to check them out. They seemed to have normal wear except for Cyl 01. This plug was really fryed. Is this a sign of too rich or too lean. Also can someone explain if the carbs burn leaner or richer in what direction to turn the jet screws.
Posted: Thu Sep 11, 2008 4:34 am
by alimey4u2
Devon, when you say "fryed" what do you mean ? Here is a chart to help...
http://www.classic-car-magazine.co.uk/a ... chart.html
Idle adjustments are air jets therefore screw out to weaken & in to richen. Maximum adjustment is 1 1/4 turns from closed but wait for someone to varify as I'm rubbish on Keihins...
However, it is highly unlikely that the idle jet range will damage a plug, unless idled for a very long time... The engine is not under load..
Posted: Thu Sep 11, 2008 7:46 am
by EMS
alimey4u2 wrote:Devon, when you say "fryed" what do you mean ? ..
No results found for fryed.
fried Pronunciation Key - Show Spelled Pronunciation[frahyd] Pronunciation Key - Show IPA Pronunciation
–adjective 1. cooked in a pan or on a griddle over direct heat, usually in fat or oil.
2. Slang. a. drunk; inebriated.
b. intoxicated from drugs; high.
c. exhausted or incapacitated through intemperance; burned-out.
Posted: Thu Sep 11, 2008 7:41 pm
by alimey4u2
Keep the questions coming Devon, we are all here to help....
Posted: Thu Sep 11, 2008 11:31 pm
by spencer
Larry said "Idle adjustments are air jets therefore screw out to weaken & in to richen."
I know Larry is an experienced carb technician, but I think the idle adjustment screw on a stock CBX carb is a fuel screw, not an air screw. As such, turning them clockwise (in) leans the mixture, and turning them counterclockwise (out) enrichens the mixture.
Being relatively inexperienced, I could be wrong, but I just looked at my old Honda carburetion video, and it seems to indicate that the screw is a fuel screw. A fuel screw is located between the slide and the engine. An air screw is located between the air cleaner and the slide.
Correct me if I am wrong.
Posted: Fri Sep 12, 2008 5:10 am
by alimey4u2
I too am not sure Spencer, as I said before, I'm sh!te at Keihins....
What it does say for this forum is that people are comfortable to disagree...
Posted: Fri Sep 12, 2008 5:20 am
by spencer
That's why it is so great to be able to come here and ask questions of all the experts like you.
Posted: Fri Sep 12, 2008 6:25 am
by alimey4u2
After almost 30 years with the bike I too am still learning from others....
Posted: Fri Sep 12, 2008 8:17 am
by EMS
Mmmmh!
I always thought IN is leaner, OUT is richer..
Posted: Fri Sep 12, 2008 9:19 am
by alimey4u2
Looks like you guys are right, I always thought it was an air mix adjustment not fuel....
