A few months ago I put termi high exhaust mufflers on my 2005 Monster 620. It looks great and runs great. I took a nice ride through the local mountains and checked my fuel economy - 56 mpg! This was 10 mpg better than when I had the previous exhaust (staintune). Even though this sounded favorable, I was concerned that I might be running lean. I checked the plugs and, sure enough, they were white, indicating a lean condition. After looking a number of ways to tackle this issue, it looks like a Power Commander 3 is the most efficient way to correct this.
Does anyway have a recommended map on the powercommander.com website or have a custom map that you will share with me for this combination?
Have you checked the Powercommander library? Download a map for mods similar to yours and if not happy finish the job with a dyno tune. Really worth the money to have the motor sweet and happy.
I have a buddy with a 620 thinking of doing the same.
There are seven maps in the library. Make sure to select the map for the correct continent. [thumbsup]
There are maps for pipes and pipes and airbox mods.