yamaha11 Posted May 5, 2010 Report Share Posted May 5, 2010 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? Quote Link to comment Share on other sites More sharing options...
yamaha11 Posted May 5, 2010 Author Report Share Posted May 5, 2010 one side seems to run rich, could one float be out of adjustment? how do you fix this problem Quote Link to comment Share on other sites More sharing options...
pondtunes Posted May 5, 2010 Report Share Posted May 5, 2010 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. Quote Link to comment Share on other sites More sharing options...
yamaha11 Posted May 5, 2010 Author Report Share Posted May 5, 2010 i souldnt have an air leak the motor was just check out last year but a builder Quote Link to comment Share on other sites More sharing options...
yamaha11 Posted May 12, 2010 Author Report Share Posted May 12, 2010 its at 48 pilot and 152 mains does this sound a little lean fir the cool weather. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.