jetting my 421

[yamaha11]

i have a 421 with clean up port with 35mm pwk carbs and cpi inframes. what should the jetting be, im in michigan? also what plugs should i run in it?

[yamaha11]

one side seems to run rich, could one float be out of adjustment? how do you fix this problem

[pondtunes]

Double check your idle screws and make sure there the same, if you've got the same size jets in both sides you might have an air leak in the non rich side causing it to lean out. A leakdown test would find it.

[yamaha11]

i souldnt have an air leak the motor was just check out last year but a builder

[yamaha11]

its at 48 pilot and 152 mains does this sound a little lean fir the cool weather.