Bike has trouble running with no choke. Idle hangs. Ideas for what I can check/ change?
If it has problems running with out the choke. The pilot jets are clogged and need cleaning. This is the case 95% of the time.
How much can I turn them out before i have to go up in pilot jet size? I'm out 3 full turns right now
If you have to go more than 2.5 turns it's usually an indication for a bigger pilot jet. But for high altitudes a smaller one is needed. In most cases the stock pilot jet will work fine. Also a proper adjustment in idle speed may be necessary.
Also isn't a hanging idle indicative of a vacuum leak?
Yes. Also it could be a lean condition, idle mixture issue or a need for a valve adjustment. You may want to make some adjustments based on your altitude, the temp and humidity. A main jet change may even be necessary since you removed the airbox. since 105s are stock, a 108 main jet could be too small depending on how the bike runs overall.
The pilot jets are brand new, so hopefully they shouldnt need to be cleaned already.
Altitude is maybe 60ft above sea level. temp and humidity is moderate (bay area, CA)
What will happen is the idle will hang and then when it finally comes down it will bog down to about 800 to 1000 rpm. needless to say, I'm stumped. I have 110 and 112 main jets sitting on the work bench, would going up in main jet size help?