What color smoke? It could be a few things...leaking antifreeze into the cylinders will cause a sweet smell and a whitish smoke, black smoke is usually the bike running rich and blue smoke is oil...but it's an '05 so it shouldn't be any of those :/
Does it go away when the bike warms up? The choke just speeds the idle up and doesn't richen the fuel mixture, so I can't see it being that. How many miles on the bike?