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Message: [QUOTE="Rich Rohrich, post: 1237436, member: 16241"] That's because it is [b]MEANINGLESS[/b] until you get the tuning correct.:bang: When you sharpen the jetting you speed up the rate of combustion as well as increasing the piston crown and combustion chamber temperatures. The scavenging will be influenced by these changes and with it the pattern that is left behind. You are wasting your time, and by association our time by chasing your tail here. :coocoo: [/QUOTE]