by JimDirt » Mon May 18, 2015 2:41 pm
It can't physically work backwards is the issue , Open more turns is more fuel , closed in is leaner , its something else , you have a vacuum/air leak somewhere , or created a lean condition , the way to tell is to turn the fuel screw in ALL the way (but gently , do not force it once it bottoms out and lightly seats , then stop), if the bike does not die when you turn the screw all the way in , then you have a air leak , the idle will raise and lower , you should be turning it out and it will go higher , then start to go lower , same goes for turning in till closed , it will raise , then as you get close to closed it will drop until it dies
The floating Valve Seal is a issue , and i don't know how you were getting a consistent idle with it missing the seal unless the plate was stuck to the slide or something , then once you removed it for inspection you broke that seal and caused your condition
I am betting when you get the Floating Valve Seal , your issue will go away again
2020 CRF450R
2006 CRF450X

Weiser , Idaho