Lloyd,
If I was going to put on mikunis ditch the VM or round slides and head straight for the flatsides. You can pick up a set off of a 2002-2006 Polaris 600. The thumb weight will be extremely lighter. That Pol came with 38mm miks and you can probably pick up a set for around 100 clams. The jetting may be close then a wideband aftermarket o2 sensor and stand alone system is in the 200 clam range.