600 tripol
If the sled has a couple of miles on it, good mileage and safe engine running requires you have those three carbs in syn. Real simple, pull all three carbs and lay up on top of the heads, turn them so the side towards the engine is face up, zip tie the throttle wide open ( while not running !!!) then adjust each slide with the stem on top of each carb so the side of the slide toward the engine( not cutaway side ) is exactly even with the top of the carb opening.
Now when re installed one or two of the cyln. won't be doing al the work which can lead to siezure / bad fuel mileage/ poor throttle response.
Take it one step farther, while carbs are off the enge, adjust idle on each carb so a 1/16th drill bit or similar size piece of wire will just slip under the carb slide same back side not cutaway side, with the throttle flipper released and closed.
Now when you start the sled if its low, back each idle adjuster off the same amount, or up.
Makes for a crisper triple if you don't have the rack style carbs.