tuning a demon carb

[project67]

anyone have experience tuning a demon carb? no matter what i do i cant get the idle circuit adjusted-its way too rich. off of idle it runs awesome until the pplugs get loaded up from a couple of warms ups. i dont know very much about carbs but i have the manual and ive tried everything it suggests. please help

 

[vristang]

this may be the wrong forum to get help with carbs.

Maybe in the classic area?

Good Luck!

:SNSign:

 

[MrKwik]

Cant say that I actually have any experience with deamon carbs so Im basically talking out of my ass here but I believe that changine the air bleeds on those can have quite an affect on idle mixture. Cant be of any specific help but that might give you something to research.

 

[95GTAODE]

What's youre idle speed? Have you run out of adjustment on the idle speed screw? If you turn the mixture screws all the way in, will it die, or still run?

One possibility is that the primary's are open too far and are exposing to much of the idle transfer slots. to cure this, you need to adjust the seconday idle stop screw to open the secondary's a little more. 1/2 to 1 full turn should do it. You can then back the idle off on the primary side.

The secondary stop screw should be located on the bottom of the carb, on the drivers side. You will have to remove the carb to set it.

The other possibility's are a blown powervalve, or sticky needle and seat. Either one will leak extra fuel into the circuit and cause a rich condition that you can't adjust out.

 

[project67]

thanks for the help. i'll do some more research.