Another point. Before you dig in much deeper, definitely check Tom's idea of a missing restrictor, unless of course you've used the device prior to this with good success. With the later GENIIs, the TBS rarely moves and needs to be be adjusted. We see a lot of bikes at the PNW Tech Days and the later model years very rarely need to be touched. I'd be wary of digging in with the unauthorized TBS as things can go downhill quickly...if it ain't broke don't fix it! Let us know what you find. --G
To which years are you referring, please? 09-12? 10-12?
I realize that all generalizations are subject to some latitude, so I'm not asking for too fine a point on this. Just your experience & observations.
My '06 was MUCH more stable than my '04 which seemed to be all over the place each time I plugged the sticks in. At our PNW Tech Meets, in general, the '08s and up seem to be very stable and rarely require any change(s). For grins we'll often try to make one better and then end up back where we started. We've probably checked 3 or 4 dozen later model FJRs and even those with miles (50 - 70K+) require no adjustment.
Definitely not a big enough sample to draw any conclusions, just my $.02.
Although I'm tempted to try Fred's RUTBS, my current '09 is so damn smooth, I just can't believe there's any improvement available.
YMMV
--G