Pull the lines off the carb, pull the needle assy (count the turns) and use compressed air to blow
every which way thru all the open orfices. Re-assy.

I use the H9 plug in all mine Evo's and have never had a problem. I live in the same climate
you do. Don't worry about it being too cold. If it's that cold, got no business going.

Keep us posted.