I have a Yeti 129 on a 14.5 KTM 450 SXF (520 big bore this season). I have the Yeti gas can that can carry 4.5 gallons on the front of the tunnel versus the back. I also have a 2.7 gallon fuel tank. I ran the thing dry on the first ride last year (before I had the tunnel can). I put a Pr2 Racing ECU on my bike midway through the season and saw my fuel consumption go way down, have 10 maps, more power, easier starting, less gas in the engine oil, etc. With it, I could ride all day and I might have to put an extra gallon in, if that. Consequently, I only fill the tunnel can up with 2 or 3 gallons and I never need even close to that. We will see how the 520 does.
I am hoping for the same results with the pr2. I know jeff adds fuel in the maps but it must not be significant when you take away the “overfueling” issue these bikes have in the snow.
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