Although I initially reported that 7.0 solved all fueling issues on my '06 K1200S, further riding shows otherwise. Current mileage: 8630, on 7.0 since 5948 miles.
The episodic, jerky off-throttle behavior still sometimes happens, but is less severe -- I'd estimate about 1/3 to 1/4 as intense.
It's most noticeable in 3rd gear sweepers around 50 mph, when you're gently rolling on/off the throttle. Normally such throttle transitions are very smooth and linear. When the problem happens, gently closing the throttle at first causes a smooth reduction, then power suddently drops to zero.
Problem comes and goes. When it happens, it's consistent for a period, say 1 hr. Shutting down the bike for 5 min always makes it go away, sometimes for 10-15 min, sometimes longer. Sometimes if I continue riding, it goes away by itself.
It's just like the 6.0 behavior, except less severe. 6.0 (on my bike) was borderline dangerous, the behavior on 7.0 is somewhat irritating but I can ride around it.
Problem happens with both stock intake/exhaust, full Akropovic exhaust & EVO intake, with and without O2 sensor connected. Have done TPS and ECU resets multiple times.
The fact it got better with 7.0 implies a non-physical cause: fuel injection software, not sticking throttle mechanism.
According to this thread, 7.0 incorporated sequential shutdown of injectors when closing throttle: http://www.k-bikes.com/forums/showthread.php?t=7168
Has anyone else who had significant closing throttle problems on 6.0, and who upgraded to 7.0, experienced this?