Main jet choice will effect bottom end. That's why you select it FIRST during the jetting process.
re: 'it is a pain getting the carborator out..'
You don't have to take it out to change the slide, needle, pilot or main.
Loosen the boots, rotate carb as required to get the top or fuel bowl off.
And you don't have to do any of that to change the main. You can get to that by removing the plug on the bottom of the bowl.
Helps alot to have allen head screws on the fuel bowl. Then get a ball-end allen wrench for your fender bag.
Piece-o-cake!
kdxt: 155 main is too lean for me at sea level, hi load (sand). Don't know how hi y'all get in ga. Never hurts to check it out (plug chop).