RE: Re: Keihin fcr jet
I have the same carb (It's an oem honda carb right?) I've looked high and low, and could not find a replacement anywhere that was a different size. Also, the air screw does not fit. Believe me, I've tried.
I run that carb on a 600 with a big gun exhaust. I left the main jet at 175, and dropped the pilot jet to 38 (might go a hair smaller). It's not exactly right, but runs pretty good.
I guess you could fill the air jet with epoxy, and drill it to size.
How did you make the connection to the air filter elbow?
Good luck. (If you do find a replacement somewhere, let me know)