it will cost you a bit more if the parts are still available, but the oem parts will fit. problem i have run into with the kits from the aftermarkets is about half or better of the kit parts dont seem to fit.
there are a few out there that have specific kits for the keihin carbs, seems like winderosa had a good match.
assuming you can get all the hard parts out like jets, choke plunger, etc, its the diaphragms you need to refresh the carb. you need to take your time and not animal the parts you need to reuse and cant replace.
orientation is key as you have many options as to which way they could go. pictures or markings during the removal process will simplify the rebuild.