Ok so I am waiting on a check in the mail for 600. I will have another job soon so I can upgrade later if there are parts I can get away without for a while. About a week ago I had very little knowledge on these bikes and had only owned a VERY ****ty 2 stroke bike I got of craigslist. I am wanting to build a 4 stroke bike and am looking for good top end speed, no hills in my area at all. I have not decided what kit to go with, Ghost Racer 7g has my attention so far. Anyone got any tips that could help me out ?