|
Lean mixtures don't affect power as much as rich mixtures do and you won't get lean misifres until you hit the 18-20:1 air:fuel range, so don't worry too much about that. If you can't get the lean mixture down, then run premium gasoline to prevent detonation.
The wet bottom end can be several things -- too small straight diameter on the needles, needles set too high, oversize pilot jet, oversize slide port.
Are you using the stock needles or the DynoJet needles? If you've got the DynoJet needles, then go back to stock and see how it runs. The stock needles are stamped 5E1. (Also if you've got the DJ needles then the slides have probably been drilled to open the slides faster.)
If you've got the stock needles, check the pilot jet size. Stock is #40 on the Mikunis and I wouldn't go too much over that. If the pilots are bigger than about #42 then replace them and see if that gets rid of some of the bottom end richness.
With stiffer springs the needle taper will kick in later and I suspect that's why you've got the rich spot at 5700 rpm rather than the usual 4500-5000 rpm.
Jim
|
