Yes, the stock map is quite lean, especially around 5000 rpm for emissions.
Here's my experience:
I had a PCII
on my VFR before I got the 954 and liked what it did, so as soon as I got the 954 I ordered my PCIII
. I had an Erion aluminum slip-on and stock filter when I installed the PCIII
. I used the #1 map as it was closest to my setup, and found it smoothed throttle response and got rid of the flat spot around 5k rpm.
Last season, I put the stock can back on because I was attracting too much attention from the local LEOs with the sound. I was amazed that the response was much smoother, and the SOTP dyno told me I increased the ponies by a little with the same map.
Whatever, I liked it.
I averaged 40 mpg each tank. About 37 mpg when I got feisty, but I don't know at the track, since I forgot to set the tripmeter when I went. (I only got to do one day last season.)
As I understand, the PCIIIr
allows ignition timing changes. Unless you are modding your engine with a different cam, or changing compression ratios, it probably is not worth the extra dosh.
Two different bikes, two different PCs, owner satisfied both times. That's my story, and I'm sticking to it.