This question is directed mostly to Canadian Dave but anyone else who rides in similar conditions is certainly more than welcome to respond.
I have a 2001 KDX 220. I've just installed an FMF rev pipe, Power Core II silencer, Boyesen power reeds and done the airbox mod. The carb is the stock 33mm. I went to the Just KDX website and as a starting point it's suggested that with these mods I use a 40 pilot and 142/145 main. Dave, are these good starting points for the Calgary area or do you recommend something more specific? As you know, the elevation can vary between 1,000m (3,300') and 2,000m (6,600'). An average temperature would probably be about 20 degrees C (70F). Thanks again. I don't know what I'd do without this site and all the great people here :D