Air Box Air Cleaner Adapter Kit fCOMPATIBLE WITH Mikuni HSR

A couple of things. One, there are air ports in the carburetor near the bottom of the circle that are somewhat blocked by this adapter. I felt a venturi effect could happen to the port under high flow conditions, so I blended that area to clear the area so there would be no possibility of it. Second, I had to use spacers between the backing plate and the two mount brackets. I used valve cover washers which are rubberized on one side and washer on the other. That took care of the approximately 3/16 gap, which could be due to the carburetor being longer or the adapter causing it. Didn't look into it, just fixed it. The carb is properly mounted, made sure of that. Mikuni manifold also.

Excellent quality

Worked perfectly. Correct adapter to go from Mikuni 42 to 1340 evo air cleaner .

Recommend

Much better quality than the rubber one that I replaced with this. Fit perfectly