I see so many different answers in dozens of different threads, and I'm not even sure if my new '21 has the same equipment as some of the older bikes.. I ride at sea level and am wondering what main jet size, pilot jet size, number of turns on the fuel screw I should start out with. All for the stock exhaust, but then also what settings for a DG exhaust would be greatly appreciated. Regarding the needle, it seems like most people just use shims, but is there a performance needle available for the TW? Also, which fasteners should be replaced with higher quality ones, and is there a list of hardware info like length, thread pitch etc? I would like to just have them ready before pulling the carb.