How "fat" is your main halyard? If it's too fat it will prevent a smooth raising of the main as it takes up space in the track and rubs the opposite direction the sail is trying to go. Try as thin a halyard as your hands (with gloves) can tollerate. Most people use 1/4" maximum for main halyards, smaller if you can. Spray the bolt rope with sailkote too.

I just washed and sprayed my entire mast track with sailkote and the main goes up so fast and smooth now I couldn't belive I had been pulling so hard for the last several months. You might have some spider egg nests in there as well. I did. <img src="http://www.catsailor.com/forums/images/graemlins/blush.gif" alt="" />