So it's an open K&N filter. Not just the filter that fits in the stock air box? Because that makes a big difference. A few things go into how rich or lean you're running. If you are up around 5 or 6 thousand feet a 162.5 might be good. Down around sea level it's pretty lean. There is overlap in the different carb
circuits but unless you ride wide open all the time you aren't on the main
circuit that much. I would look at the PMS
setting, float level, And see if the PO
changed the pilot
jet. It should be a 35. The 3rd groove (from blunt end) with 2 washers under the spacer is a way to go half way between the 3rd and 4th groove. A washer is equivalent to a 1/2 groove. If you are going to get a jet kit I would recommend the Barons kit. It has everything you need. If you go with a Dynojet jet kit pick up a 180 Dyno
main too. That jet doesn't come in the kit and it's the one that works for a lot of people. It sure won't hurt to back to step one and go through the process. How are you estimating your mileage?