Took my newly aquired '06 XB12Ss out on Saturday for the first time. The bike came with an aluminum Jardine, as well as with the stock exhaust and hardware.
After firing up the bike for the first time, I decided I should make up one of the Quiet Module Inserts from a piece of scrap alumimum barstock, and Saturday's ride was the first test of the insert.
It definitely makes a difference - the bike is still pretty loud, but it takes the edge off and reduces the overall level quite a bit. It remains very throaty and doesn't have any of that SuperTrapp wheezy sound. I rode for about an hour total, and didn't have earplugs in, and with the RF-1000 helmet it was rather pleasant, with none of the resonating complaints others have had with the stock Jardine.
I can't compare performance to anything, but it ran very well. I pulled the plugs yesterday to replace the OEM with Iridiums and they were a perfect light tan. I still am considering going back to the stock muffler after I finish stripping it down and repainting it, as I've seen dyno charts of the Jardine with insert and it's no better than stock, and actually has less midrange torque because the stock muffler has a longer path length in the midrange rpms with the exhaust valve closed for better torque.
I do like the sound, though...
Chris