honda 450r 2007 Thinking bout getin hrc kit.. I have rev box,kurtis spark headers n pipes. Just wondering how much bottom end and top end hrc gives u. and if they are hard on the motors.

 

I don't know anybody who doesn't have one, so I have nothing stock to compare it to. Nobody is having to do rebuilds yet, and I am starting my 4th desert riding season with no problems. It will net you mostly more top end I think.