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why would u waste your money if u buy 5 gallons of c-12 which is over 100 octane why knock the octane down by mixing with something with lower octane
 

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prnstar1969, what is your jetting you run with the ultimate 4, and what all mods do you have? whats the temp where you live?

its getting realy cold here (ky) and theres a race saturday and im trying to figure if i should jet it up a little more or not..
 

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i am at sea level and its in the 40 and 50s here i have air box lid off full hmf exhaust and cam mod iam 175 main 50 pilot (you could maybe go alittle leaner on the pilot)3 out on the screw and stock needle and postion (which is like 3 or 4th)
 
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