Many people are under the assumption that to properly adjust the idle mixture on a CV carb that you just turn it open 3 turns and that's it.
There's much more involved in adjusting the idle mixture on a CV carb.
First off warm the engine up completely and make sure the enricher is fully off.
From there after the proper jetting is achieved, the idle mixture screw should be lightly seated and then the mixture screw opened up slowly until the highest and steadiest idle speed is achieved. From there I like to close the needle just a very tiny bit to the lean side for a crisper throttle response.
You adjust the idle speed next and then re check the mixture setting one more time to get it optimized.
Generally speaking, if you have to open the idle mixture much more than about 3 turns, your low jet is too small and conversely if you open the idle screw much less than three turns, the low jet may be too large. The norm usually falls between 2 1/2 to 3 1/2 turns open for most bikes but again it depends on jetting here.
There's other posts in this area that will tell you how to check to see if your jetting is correct for your application.
There's much more involved in adjusting the idle mixture on a CV carb.
First off warm the engine up completely and make sure the enricher is fully off.
From there after the proper jetting is achieved, the idle mixture screw should be lightly seated and then the mixture screw opened up slowly until the highest and steadiest idle speed is achieved. From there I like to close the needle just a very tiny bit to the lean side for a crisper throttle response.
You adjust the idle speed next and then re check the mixture setting one more time to get it optimized.
Generally speaking, if you have to open the idle mixture much more than about 3 turns, your low jet is too small and conversely if you open the idle screw much less than three turns, the low jet may be too large. The norm usually falls between 2 1/2 to 3 1/2 turns open for most bikes but again it depends on jetting here.
There's other posts in this area that will tell you how to check to see if your jetting is correct for your application.