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IMO, you've got to come up 1 hole. I carry less fuel and I carry it further forward and even when mounted all the way up, I won't blow out with the Viper 17".

I ran 2 holes up for a year. Moved all the up last year and everything improved, although I don't think the improvement was significant. My low speed (1200 rpm) vibration got worse although I can't surmise why it would matter. I'm going back down to 2 holes up to see what the vibration does. I'll probably leave it there but we'll see.

Chris