I'm surprised at the somewhat negative tones to the thought of someone doing a full system for the FJR.
It's not like if every FJR sold in the last 4 years all went to full systems caused the ozone layer to collapse. Hell, one poorly tuned 70's vintage Mustang or Camaro puts out more pollution than every FJR every made combined.
I'm even MORE surprised no one has done a full system already.
Heck, I've only had my FJR for 9 days and already want to replace the whole system. I personally wouldn't waste money on slip-ons.
It's not necessarily about power or sound, although changes in both aren't necessarily bad things.
I did the whole "Muzzy" exhaust routine to my ZRX for both performance and sound reasons. Granted, NO modern motorcycle of 1200cc' or more really needs performace boosting, and riding "stealth" can be a plus, especially in residential areas, but losing 30 pounds, picking up about 20hp (with jets) and having a stealth bike under 4k rpm for under $700 was a no-brainer, not to mention the aftermarket system just smokes the stocker in the appearance department.
What I'd be looking for in an aftermarket system for the FJR would be a full stainless steel system that turned a beautiful gold color after a few heat cycles, that sounded more like a motorcycle and less like a sewing machine, that placed the pipes in such a way that my boot heels didn't leave burned gummies on the mid pipes (shame-shame, Yamaha) and finally, didn't have a catalytic converter pumping out about 900 degrees of heat 6 inches away from my ankles. Oh...make it a 4 into 1 into 2 system. I like the aesthetic balance of 2 mufflers on my Feejer.
I'm guessing if Dale Walker every brings a full system to the market, it's gonna be $1000-$1200. Any bets?