Blaster Gas tank pressure/ PSI

[Dirty Jersey!]

can anyone help me out and let me know how much pressure the stock gas tank holds, me and my buddy are looking to get custom tanks made for our skis made out of aluminum that way it looks cleaner and will fit nicer with the rocker.:Banane01:opworm:

 

[Proformance1]

there are some threads on the check vales you can look up but if memory serves me they are 4-5 psi ish