Did you know it was a track bike when you bought it, and do you want to turn it into a road bike?

If you plan to keep it as a trackie I wouldn't worry about too much of that stuff... If you want to turn it into a roadie, well, I wouldn't bother, but I'm sure its been done so I won't stop you!

Have a read about the carbuertion in the tuning section for what the powerjets do. Mine is missing one of the air solenoids, btu runs pretty well without it.

I dunno what the box is, but my mc18 has something that sounds similar. If the bike runs with it in so I'd just leave it in there! My bike only has a PGM1 though so It could be something completely different.