That is correct. You don't need a tailwheel endorsement to fly a tailwheel KR. But again, I think it would be completely foolish to try to fly a KR without tailwheel training and if you are going to get enough training to be proficient you should get signed off.
Personally, I got about six hours in a Citabria before I dared to taxi my KR with the tailwheel up. The reason that I researched the rule is because I was near a signoff in the Citabria when my instructor took a three week trip to Venezuela. He told me that he would probably sign me off on the next flight and the only thing we still needed to do is wheel landings. I didn't fly my plane until I did about four hours of high speed taxiing and I could keep it perfectly straight on the centerline. When my instructor came back I did some wheel landings with him and got the signoff. Again, I didn't try wheel landings in the KR until I did some with the instructor in the Citabria. Oddly enough, when I called for insurance quotes no one asked me if I had a tailwheel signoff, but I wouldn't be surprised if the policies stated in them that you must have a tailwheel signoff to be covered in a tailwheel plane regardless if you are technically legal. I will state one more time: Don't try taxiing your KR with the tail up until you have been trained by an instructor and are proficient. I also very highly recommend that you have the endorsement in your logbook before you do it. Dan Heath wrote: RE: FAR 61.31 (d) (1) states that a pilot in command must "Hold the appropriate category, class, and type rating (if a class rating and type rating are required) for the aircraft to be flown." Part (k) Exceptions states "The rating limitations of this section do not apply to- ... (iii) The holder of a pilot certificate when operating an aircraft under the authority of an experimental or provisional aircraft type certificate." Then, that means that no one needs a tailwheel endorsement to fly a conventional gear KR and all the talk about having to have one, is just a bunch of speculation??