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I know there are only a couple people on the board who have this bike besides me.
As you know there has been plenty of whining, gnashing of teeth, wrining of hands, etc.. about VTEC transitions, abrupt on/off throttle transitions, flat spot & stuttering in the EPA 4000-5000 range, etc.. with this bike.
Some people claim to have it, some people don't.
The riders in the UK have been much more obnoxious bothering Honda about this.
It sounds like someone has finally figured it out and Honda is maybe going to come clean and issue a service bulletin on this.
Anyway it is a 5 minute fix you can do in your garage if your bike is affected.
Unlike most bikes, this bike has two Oxygen sensors in the large collector under the bike. The catalytic converter is in this part of the exhaust, it is at the very bottom of the bike.
If you look from the left side of the bike you can see the two O2 sensors sticking out of the side.
Take the left fairing off and/or just loosen it and pull it back. Trace the wires from the 02 Sensors to the wiring harness. One of the O2 sensors has a black plug, and the other has a white plug.
The cause of the FI problems is apparently that some of the bikes had the O2 sensors reversed during assembly. Each of the sensors is responsible for controlling the mixture on two of the cylinders. The sensor that attaches to the black plug on the wiring harness is supposed to be installed in the TOP exhaust port. The sensor that attaches to the white plug should be installed in the BOTTOM port. If they are reversed it is supposedly confusing the hell out of the ECU as it will try to adjust mixture and the sensors will read wrong. (E.x. the rear cylinders are supposed to run richer than the front cylinders AFAIK)
If your are reversed you can just reverse them where they attach to the wiring harness, there is no need to take the sensors out of the exhaust and swap them.
I already have the O2 eliminators and the PCIII but I'm going to go check my bike. If mine are reversed I am tempted to try zeroing my map and plugging the sensors back in. If it fixes the throttle response it'll be a tough decision as the bike does get better range stock. Hard to say though as it runs great with the mods too.
If you don't have any mods it is definitely worth checking this.
Ben