[blake mccollum]

I have 1981 cx500 i recently had a problem with a broken air mixture needle! I solved this problem but now i need help! I replaced the airbox with pod filters! If I was going to adjust the air mix so i could get some ride time in before rejetting what would be my best bet? Maybe 3.5-4 turns out??? Any advice appreciated! Thanks in advance



Blake

 

[bandit]

I have 1981 cx500 i recently had a problem with a broken air mixture needle! I solved this problem but now i need help! I replaced the airbox with pod filters! If I was going to adjust the air mix so i could get some ride time in before rejetting what would be my best bet? Maybe 3.5-4 turns out??? Any advice appreciated! Thanks in advance



Blake

blake,i think 4 turns out and they would nearly fall out.

why not as an experiment..take them out,have a ride and pull your plugs.

 

[blake mccollum]

Ok thanks. What should i see on the plug light brown???

 

[bandit]

Ok thanks. What should i see on the plug light brown???

if you ended up with light brown/tan coloured plugs,you would be perfect.

im not suggesting you run with no mixture screws forever,just an experiment.plus around 4 plus turns youl likely loose them any way

 

[blake mccollum]

Ok thanks

 

[philbrewer]

I would start the other way. 2.5 turns out run it and then check plugs. Then keep going up .25-.5 turns till you get it. Or get a colortune and do it easy.

 

[philbrewer]

What exhaust are you running?

 

[blake mccollum]

I have factory exhaust without the baffles. What is a colortune?

 

[Randall-in-Mpls]

why not as an experiment..take them out,have a ride and pull your plugs.

The idle (EDIT: mixture) adjusters are fuel meters. If he removes the screws, he'll have gas dripping out, and probably a leaner mixture from air being sucked in.



R

 

[jasonh]

ColorTune is awesome. Wish I had one.



http://www.carbtune.co.uk/colortune.html



Going to pods, you likely need to rejet, and not just adjust the idle mixture screws...because they only adjust the idle mixture.

 

[blake mccollum]

Sorry but i believe thats incorrect from what i have studied the mixture screw only controls the air coming in the carb! The needle screws in to cut off air and out to let more air in. Dont believe fuel even gets to this part from what i understand could be wrong!

 

[Randall-in-Mpls]

Sorry but i believe thats incorrect from what i have studied the mixture screw only controls the air coming in the carb! The needle screws in to cut off air and out to let more air in. Dont believe fuel even gets to this part from what i understand could be wrong!

Nope, there was a thread on the old forum that covered this. LRCXed cut one up to see where all the little passages went. It's definitely fuel.



R

 

[Shep]

 

[blake mccollum]

I seen the pic of the carb larry cut open but it looks like the passage for air mixture comes from the front of the carb and there is no gas supply there!When the carb bowl is full i took the screw all the way out no leaking just running a bit to lean!

 

[bandit]

I seen the pic of the carb larry cut open but it looks like the passage for air mixture comes from the front of the carb and there is no gas supply there!When the carb bowl is full i took the screw all the way out no leaking just running a bit to lean!

The idle adjusters are fuel meters. If he removes the screws, he'll have gas dripping out, and probably a leaner mixture from air being sucked in.



R

exactly the point of my experiment.plus i did not want you turning those screws out[4 plus turns] whereby you might loose them on a ride

 

[blake mccollum]

What are u referring to as your point my comment or the other guys?

 

[Phil in Vermont]

The idle adjusters are fuel meters. If he removes the screws, he'll have gas dripping out, and probably a leaner mixture from air being sucked in.



R

I don't recall reading "idle adjusters" until your post,Randall.

 

[bandit]

What are u referring to as your point my comment or the other guys?

yours,i did not think fuel would run out.i would imagine there are hundreds of these and similar bikes running around with no o-ring[due to various reasons].

i knew because iv taken mine out with the bike running-no leak.



the issue of your post was being impaceient to ride until you rejet.you need to richen up your mixture,yes.

if you undo the mixture screws to richen,then,perhaps your mixture would be correct or close with no screws in,ie,as rich as its possible to make via the screw.

its still better than loosing them.

 

[Randall-in-Mpls]

I don't recall reading "idle adjusters" until your post,Randall.

You are correct, Phil. I meant to say "idle mixture adjustment."



Thanks for catching that.



R

 

[blake mccollum]

True i put some fuel system cleaner and high octane gas and actually got a little riding in! Thanks for the help bandit!