Re: what psi?
 

lol tahts what he bought ------- expensive as ---- too

Re: what psi?
 

Being a noob, I'd suggest you err on the lower side of compression if you change pistons. The fact is 9:1 vs 11:1 won't get you that much more off-boost power, but will let you run more psi and be more forgiving with ignition timing, etc. DSM guys find 8:1 and sometimes less is best for making a bunch of power, but then again they're ---- is all designed for boost.

Re: what psi?
 

Those are all great responses everyone had..

I personally think you should have someone full throttle the bike right into your ------- at 10 psi. :o :o :o :o :o :o :o :o :o
I think this answers your question.

Next question please! :D