I eat my R1
Join Date: Jul 2010
Location: Terra Australis NSW
Hi mate, welcome to the forum. Pretty cool project, especially considering your age. Before you get too into it I trust you are aware that the R1 motor produces significant power especially for a go kart and some of the engineering will not be straight forward as you may think.
Anyway, enough sensible! First question is what have you actually got? Is it a bare motor or do you have a wiring harness as well? If you don't you will need one. Do you have an ECU, radiator and fans, instrument panel, air box and throttle bodies, exhaust headers, other sensors like tip over switch?
If you have the motor from throttle bodies to exhaust as well as a harness and ECU you will be close to at least getting it to run.
Plenty of parts around for that generation so you should be able to get what you don't have without huge $$$'s Maybe add some photos of what you have.