SilverBullet
Husqvarna
AA Class
Argh, I totally forgot that this bike has an Arrow ECU in it, that probably complicates things a bit.
The PO bought the Arrow pipe and ECU kit and then sold the arrow pipes and kept the ECU.
iBeat adaptor can be purchased from Semco Designs.
http://www.semcodesigns.com/Products.html
I have no idea though whether it can be used with an Arrow ECU though. Probably but better check first. Also the CO numbers I listed above will no longer apply I'm sure as Arrow ECU mapped different than stock Husky ECU. I think you're pretty much in uncharted waters with the Arrow ECU (but not the pipes), FMF pipe and JD Tuner. A visit to a Dyno tuner is probably your best shot for max power but still no guarantee it will solve your surging issues.
_