Had one on my '06 when I bought it used. As noted by others there is a learning curve to get past if you are going to fine tune it. I was tuned for south central OK, and I took a road trip last June through NM, AZ, UT, and CO. The bike ran great no matter where I was at. I recentley traded her in on a '10 and I am planning on putting a Tmax on this one as well.