Jetting Keihin carburetors on my 1978 CB750K

[bassols]

Hey guys, I'm new to this forum and could use some guidance or advice. I have a 1978 CB750K with a Keihin carb rack setup. I am installing a full MAC exhaust system and K&N cone air filter setup. Does anyone have this setup and/or help me with specs on jetting this configuration? I checked with Dynojet and they don't have any kits for any CB before 1980. Thanks.

 

[Stabler]

I'd say 125 main, 3 washers to shim the slide needles and about 1 3/4 turn out on the a/f. But every motor is different. This might get you in the ball park to start doing some plug chops. Only then you'll be sure.