i have an mc21 nota 16 thats why i said you are best getting info from guys with past experience on mc16 but most carbs are held on the same way. At the base of the carb is a rubber collar (best seen looking side on through frame rail) with a metal clip that tightens down on intake area of engine. you will probably need a long reach philips screw driver and access under frame rail from side, obviously one clip on each side of carbs. probaly best to undo throttle and oil pump cables first but do take photos so you know routing when you come to put it all back together.