First of all, thank you to everyone who has responded. As I said earlier, I purchased this bike about 2 1/2 years ago specifically to make a project of it. The bike was in very nice condition and only had a little over 15K miles on it. I only rode it for about 300 miles before tearing it down to begin the "project". During that 300 miles I noticed the problem I described with what I perceived as a lack of full-throttle power as compared to my previous 1999 K1200RS. I just kind of ignored it as being all in my head and proceeded with the project. After completing the project and riding the bike for a couple thousand miles I finally decided maybe the problem wasn't just in my head after all and that's when I decided to look into it, but wanted to get a little more educated before making any changes. That's when I posted the inquiry here and I'm very glad I did. I've received some good advice and information. What really helped was the information from Jean about the 86 degrees of throttle rotation. I checked mine and determined that I was getting about 35 degrees of rotation. So, I pulled the left side fairing panel and inspected the clamps on the rubber throttle body connectors as Jean suggested and sure enough, the clamp screw on the #3 TB connector was interfering with the adjustment screw on the TB shaft. Loosened and rotated the clamp about 1/8" and all is good now.
Thanks again for all the help
Ted
Glad you got this fixed.
Next time, just describe your problems / symptoms better in 1st post... you could have fixed this in 1 day instead having to do so much reading on the EFI and throttle-bodies systems ;-)
Of course, I am just kidding, but your 1st post was just too vague for me to have a clue. A bit later, when you finally described the twistgrip rotation limitation (compare to another good working k1200), then it was much easier for me to give the "most probable cause".
In last 17 years, I have seen variation of this bad clamps installation many times on 3 separate forums for K1200RS-LT (and one in my own garage on a friend K1200). In one cases, I had a forum member show me a picture of his throttle-bodies from top (with air-box removed). His question was something like: "is it normal that the butterflies do not open fully vertically on the k1200RS ?" Of course it was not OK, because one clamp was jamming one of the 2 cables pulley.
I consider this as gross negligence to install fairing whithout checking all possible mechanical interference - from throttle cables to anything related that was touched or removed. This a major safety item as you create a "potential" where the throttle will not fully return close on models having only 1 throttle-cable (on these, only the TB spring can force the closing). On the 2 cables models (with cruise), you would probably override the clamp restriction / interference with hand power.