I am waiting for a set of 150 Keihin OEM main jets to arrive. In the interim I tested a set of 152 Keihin OEM mains and a set of Freeman Automotive 150RD mains.
The Keihin 152 mains were too rich above half throttle.
The Freeman 150AB mains were good above half throttle but still too rich at cruise. I think the pilot circuit can be tweaked to make these work, however I want to test the Keihin 150 OEM mains before making any other changes.
Jets by different manufacturers of the same number flow differently, & at different throttle positions. Not enough to feel on the butt dyno, however certainly enough to see on the AFM.
