The cam + tune gives a modest but noticeable performance increase. It definitely helps up hills since you can leave it in a lower gear and rev higher, but top speed doesn’t seem to be too much different.
David offered a ton of help during the install. I had trouble reinstalling the cam sprocket due the tensioner settling too tightly. The solution in my case was to pull the cam chain with constant pressure for a while, and the tensioner eventually eased up. This isn’t covered in install videos, and I think it has to do with how long the cam sprocket is left off.
