It may be worth a try at that price, but I might remember that name from past posts and it always seems to come back to using OEM parts only and the trial and error, slightly time consuming task of step by step adjusting the carb until you get it right. You definitely don't want to order parts from Keyster. That company has been nothing but headaches for folks looking to take shortcuts or a fast fix. Perhaps research it better. I went with Procycle, but only after talking to Mr.Bracket and Ronnydog, and procycle put in parts for my kit accordingly. I am very pleased, the bike hauls A** !!
* I have an 87, drive it at about 2000 ft altitude and went with a 112 main, 42 pilot, 2 3/4 turns out air/fuel screw and 3 washers on the needle valve.