Running rough when cold after tune up
A couple weeks ago I changed the oil, plugs, and a k&n drop in filter to get the bike ready for summer, and since then the bike continuously seems to hate running while cold more and more. I hate letting the bike sit in front of the house warming up especially during the early mornings due to the (unknown brand) of slip-ons that im sure are much louder than the neighbors appreciate.
Rough idle, jerkiness, once in a while stall, backfiring.
When warm; bike runs fine minus occasional backfire.
Any ideas what would cause all this?