THE BIKE HAS BASICALLY ALL THE GOODIES... JET KIT, PIPE, FILTER, SNORKEL. I HAVENT DONE A CLUTCH YET. I DO HAVE ITP RIMS, WHY WOULD THE TIRES NOT FIT AND WHERE ARE YOU TALKING ABOUT THEM NOT FITTING ?Robb got his off a place on ebay that was the cheapest around, maybe he still has the link and will post it.
as far as modding the bike? Yes you will need to mod it a bit...
1st the front fender brackets are gonna be in the way so you will either have to re-bend them or buy the highlifter fender bracket kit.
2nd- you will need to get a heat gun and bend out some of the plastic fender in the rear. also keep in mind if you have after market rims they still might not fit since the offset is usually a lot.