Tri-z 170psi and still needs race gas?????

[MOTOMAX27]

Tri-z 170psi and det. I try av with 93pump 50/50 and still. Try av stright and less.

[dcreel]

Have you checked the jetting? Fatten it up a little..

[MOTOMAX27]

yes its fine. can it be the type of porting i have??

[MTS]

Got some more specifcs...250? Head set up ect...? I run 165 psi on my big bore on pumpgas without issues.