ctdiesel99
09-14-2010, 02:14 PM
As most of you know i just acquire my new to me quad last week. When i bought it, it came with a receipt for a top end build that was performed this past May. It doesn't say on the receipt nor does the guy i bought it from know what compression piston was used. It does say that it was bored though, and the guy i bought it from said it was a 440. So to be safe, should i run race fuel, mix race fuel with 93 octane, or just run 93 octane by itself? Would it hurt if i ran race fuel only even if the piston was of a lower compression ratio?