Welcome, I believe those are rack carbs, as in the cables attach at one point and then linkage does the rest to make them function in sync? First and foremost is getting them out, torn down, cleaned and checked out for any parts that need replacing. If you can turn a wrench you will have no problem getting the airbox off, cables disconnected and the carbs removed and on the bench. Unfortunately I can't help too much spec wise. You may want to check out https://totallyamaha.com for specific info or even buy a manual for that sled. Good luck.