i run 89. The manuel says 87 but i heard some very light pinging.

 

I run 87 in mine. No problems with it.

 

I WOULD ALWAYS RUNT THE HIGHEST OCTANE PUMP GAS 93 OR 92 NEVER ANYLOWER


WHATS UP WITH THE SIGNATURES POSSIBLY?

IF IT WAS MY QUAD I WOULD NOT GO TO THE EXTREMES OF SOUPING IT UP

YOU MAY DECIDE TO SELL THE Z250 AND GET A FASTER MACHINE SO WHAT I WOUD DO IS JUST A BASIC

PIPE JET AND AIRFILTER THATS ALL YOU WILL NEED IT WILL GIVE YOU THE EDGE ON OTHER 250S AND FELL MUCH STRONGER AS COMPARED TO STOCK

 

I would recommend Ammoco Ultimate, it costs a little more and runs great! I wouldn't reccomend anything under 92 octane either, and NO Ethanal fuels either![img]i/expressions/face-icon-small-shocked.gif[/img]

 

Using high octane fuels in a motor not designed for it is a waste of money and performance. High octane gas gives you nothing but slower burning fuel. If your motor doesn't ping or detonate, you don't need it.