Vacuum leak, Somewhere --help!!--
87 CMX 250 Rebel.
So shes got really bad idling issues, wont hold a steady one, will suddenly bog down while riding and while idling. i have to adjust the idle speed manually so the bike will rev/idle/run comfortably. now a unsteady idle speed ive come to understand, is due from a vacuum leak.
ive tested for leaks with starter fluid all around the system and the only reaction spot was near the air intake boot. so i pull it off to examine it, and it is in great condition. i clean it and put it back. first few miles she does great, doesnt randomly bog down and held an idle well.
after traveling to a friends, it bogs down out of no where again. recently it just seems to be getting progressively worse.
My next step is to replace the o-ring gaskets for the other side of the carb(engine side). there is no reaction in that area with a vacuum leak test, but i know its part of maintenance, so i might as well.
any other possibilities for vacuum symptoms but no leaks(that i can see) or different place to check?