DragBikeMike wrote on 12/02/21 at 16:31:19:Hey Dan, who did you get your PWK from? I can see it has a stamp or etching on the side that indicates it is a 40mm. I wouldn't mind an additional 2 millimeters. Can you measure the bore and see if it is 40mm all the way through? Not just at the outlet but ALL the way through.
Also, does your PWK have a notch in the needle jet hood, like this?
My bad….