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mix screws

Adjust for hightest idle speed. If less than 3/4 turn out is required, change to a richer (larger) pilot jet. If two (2) turns out or more are required, go leaner (smaller) in jet size.
Click to expand...

This doesn't make sense to me. The mix screws effectively richen up th emixture when turned out, so if you have to set them 3/4 turn or less out, that would indicate too rich of a pilot. The more you turn out, the more you are compensating for a lean jet. Whatever- none of what my carbs are telling me makes sense.

So I'm glad to know that for the past 8 years I have been adjusting my floats correctly. That's good news. I am still gonna lean them a little bit.

Interesting test last night Keith, the bike was running well last night, but I decided to pull off the air filters as a test thinking maybe I oiled them too much, and that was why the jetting seemed too rich. The bike didn't want to idle at all without the filters on. Weird, I would think that taking them off would make a slightly leaner condititon, and that the bike would idle higher, but the idle went down about 400 rpms with nothing more than pulling the filters off. What does that tell me?
 
The CV carbs just don't operate well without some kind of filter on them.
Some say they don't operate well with pod filters, period. Their design seems to require a certain amount of restriction.
If you visit different websites on jetting, carb tuning, etc, you'll find small bits of info here and there about the mixture screws. I know how they work, but sometimes you'll get some info about what different symptoms mean.
The mixture screw allows more MIXTURE, which is both air and fuel, and this amount increases until roughly 3-4 turns out, then the screw has no more effect. The screw regulates a second passage to the carb throat and is meant to fine tune, or assist, the pilot jet.
 
Great thread! Found it while searching through "future" problems I may have on my not yet assembled carbs.

Jethro, did you get that studder figured out? Timing, P jet?
An update on your issue would be awesome!
 
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