OK, here is the latest scoop regarding mods and warranty. I went back to my local dealer today and hunted down the service manager. I told him what I had been told Tuesday by another employee at his dealership. He could tell I was upset so he took me into his private office.
He said, yes the MOCO does "blackflag" your VIN when you add a SERT. He said this does not automatically void your warranty, but if you blow up your motor the MOCO is going to be asking the dealership doing the repairs a "lot" of questions. He said as long as you are running the "map" that the MOCO recommends for your bike (#84 for '07 SE Ultra) and you have not altered the SERT map (the ECM remembers all settings the SERT has been on) then there should be no problems with getting it repaired under warranty.
He said the problem arises when someone has major engine failure and the SERT-ECM shows that they have been running a map that the MOCO doesn't approve for that bike, such as one that allows the rev limiter to exceed the recommended RPM limiter.
As far as what I was told about the trailer hitch voiding the entire warranty, he said yes it used to be that way. But now it would only cause a problem if you trashed your transmission or burnt up your alternator and the MoCO would have to know that it had a trailer hitch, such as the factory service rep actually being at the dealer at the time the bike was in for repair and if the factory rep saw it had a hitch then you might have a lot of questions to answer and they might deny your transmission repair or new alternator warranty claim saying the extra electrical load caused the alternator to go out or the extra weight caused the transmission to go out.
He said mods to new bikes is still a very gray area and the MoCO is being very quiet and cautious at this time. As far as Power Commanders, he said he would recommend everyone stay away from them because it gives the MOCO more leeway in denying warranty claims.
I told him all I wanted to do is add a Stage I A/C, and slipon aftermarket mufflers (V&H ovals), and have the dealer install a SERT at the factory recommended "map" #84 so it would run right and he said he didn't see any problems with this set up and he didn't forsee any future warranty problems w/ the MOCO. I asked him if I could get that in writing, and he said no. The only way he said I could totally avoid any warranty problems was to leave everything stock. But he said he would be totally surprised if the MOCO ever gave me any warranty headaches with this set-up.
I guess since this is still a "gray" area that is why so many people including myself are getting conflicting info from dealership to dealership and in my case from person to person in the same dealership.
As soon as I reach my 500 mile break-in, I'm having the SERT, Stage I and V&H slip-ons installed. I sure hope this guy knows what he is talking about. I am thinking of buying the extended warranty and I don't want any hassles in the future if I have any warranty repairs.