I put v and hines slash cuts and a K and N filter on my voyager and road it for 2500 miles without a power commander. The bike ran ok a little pop her and there and 40mpg. It was a little sluggish from 2000 to about 2700. So I bout a power commander off a nice gentalmen on the site and installed it. Road 900 miles yesterday and today took laptop with me and tried 5 different maps and all of them got me 30 to 33 mpg. Not sure what I can do now besides have the bike dyno tuned unless someone has a map they think will work that would be great. Not really concerned with arm jerking power just want the bike to run smooth and alot better mileage than 31 t0 33mpg thats horrible! Any help or advice would be apreciated thanks!