Petcock for Honda CB500T / CB550 K1 - K2 / CB550F / CB750 K5 +1976 / CB750F + 1976
By the mid 1970's Honda had made many changes to their gas tank designs and therefore to the petcock designs used on those tanks. There was a lot of mix and match parts in this era as Honda was evolving their design and supply chains. Many of these changes were poorly documented at the time. This particular petcock design, identified by its threaded connector to the tank (uses a 24mm wrench), dual outlet body without sediment bowl, we call the "mid generation" style petcock. This design was used through 1976 production bikes.
This petcock will fit and function on CB500T models but has a different design. Unlike the original Honda petcock, which has side fuel outlets for carburetor clearance, this petcock features bottom-exit outlets. As a result, it may need to be positioned sideways or rearward for proper clearance.
Installation Tip: The threaded petcock body has reverse threads to the connector, threads to the tank are normal. Remove the connector from the petcock and reinstall it to the point of where the threads start to engage. Then start the connector on the tank threads. As you tigen the nut, the tank and the petcock will be moving together evenly to meet in the middle of the petcock body, properly compressing the sealing gasket. Use a 24mm wrench or large adjustable wrench, do not over tighten, just sung enough not to leak.
