Part: Honda CB550K3 / K4 Carburetor Rebuild Kit - Kits are sold individually, you will need to order FOUR kits to service all the carbs.
Why You Need This: If you've adjusted everything and your Honda CB550K3 / K4 is still running like crap there's a good chance your carbs are just full of gunk. If you're pulling them out it would be wise to freshen them up with these carburetor rebuild kits. After a thorough cleaning, rebuild and sync, your CB550K3 / K4 should be running like new again.