I don't know how HD can require some form stating "I, the undersigned, will not alter the motor..."
But I'm already wondering about the alter-ability of the 2007's. Early this year, my local dealer told me that for the 2006 models, there were only a few, HD package deals of mechanical upgrades the dealers would do. Both the 95" and 103" kits were available but only as part of a package which included cams (rather mild cams, I might add) and that the exhausts must either remain stock or include a set of HD dealer-only pipes that used a catalyst. He showed me the paperwork from HD with the parts lists and all. There was no more parts picking and choosing and a whole lot of other hi-perf parts were going away (from HD, anyway).
However, you could still go wild with your 2005 or earlier motor, depending on what parts HD still offered for earlier TC's.
So now it's 2007 and HD's come from the factory with bigger engines. Does anybody know what the dealers will be allowed to do to them? Are the Feds and EPA going to start sniffing the pipes of 2007's?
Maybe HD is figuring that folks won't want to mess with a motor that's already bigger, but we all know how that goes.