Motorcycles, Snowmobiles, Go-Carts, ATV's and Golf Carts - Should I Beef It Up?

I'm currently working on 2 projects and one is a go kart with a 2 cylinder snowmobile engine. I was wondering since i'm going to have alot more power than the average go kart motor should i beef up on the brakes and if so should i do drum or disc brakes with a caliper? And should i put sometime of suspension i'm not going off road but do you think the vibration and the speed on a normal road rattle my front end all to pieces and possible brake a tire or something loose? and if so should i do an independent suspension and if so how would i do that, and do you think i could get small leaf springs made for small trailers to throw on the back or should i do a shock absorber there too?