did you fatten up air screw? as cold as it is here, it would be lean. air screw would likely need to be all the way in, or like mentioned, increase the pilot size. Adjusting the cable to get an idle is bad, really bad. It can make the bike rev, when you turn the bars, or can even caus the motor to rev out of control just sitting there. the slide closing helps kill the motor in the event of an air leak or ring heating up during seating. Also could be slide wear where the idle screw makes contact. Im guessing freakin cold is makin the k5 unhappy...