this prolby aint good??

[chases]

i am running 93 in my yfz450 and it has a 13:1 piston and it runs like crap.. should i be running race gas and what number octane?

[#17YFZRACER]

def race gas:eek2: over 100 octane for sure not sure how far maybe 102. you need race gas for anything over 12:1

[chases]

i read that you should go 50/50 race and 93

[#17YFZRACER]

does it knock and backfire real bad?

[chases]

it knocks bad and backfires a little not much tho