I decided to "bump up" by +2 units the FI map for the "Low Throttle / Low RPM" section of a FI "custom" map, and load that to the GYTR Comp ECU, for a '13 WR450F.
That's the "lower left" corner of an FI / Ignition map sequence on the GYTR Power Tuner.
Doing this reduced the red header glow pretty dramatically, but it's still there.
The off-idle throttle response is snappy with this setting, it's the only one I changed for this custom FI map. Everything else is "liveable", for me, for now. I'm hoping the fuel economy with an "all zero's" map (with the +2 exception in the lower left corner) is good too, along with being "livable" (for me) throughout the rest of the throttle range. Time will tell...
To be clear, I'm attempting to solve a set of constraints: No "glowing red header" (which I take to mean the valves are burning from passing too hot exhaust gasses for too long a period maybe caused from too lean fuel mapping, maybe caused from too retarded ignition), No "Boiling Over" from excessive low speed heat (from too lean low throttle settings), and "acceptable" fuel range from the stock tank (I'm cheap, so I dont want another tank, and I dont want more weight up high from more fuel), along with "acceptable" power (I want to know I'm riding a 450, not a 250).
"Acceptable" fuel range is translating to ~ 35-40 MPG, for now, *with mixed riding* to include some 4th gear travel. That's roughly a 70-80 mile range. It's a little shorter than I really want, but that's my interim goal (along with the other constraints I've already written). "Acceptable" power is a bit harder to quantify without a dyno run, so mebbe I'll do that. I dont know if / where I'll get access to one yet, or that cost (<sigh> another cost). I'm **guessing** I should be able to ek out 40-45 HP without serious mods, or sacrific too much fuel range.
So, within those parameters, I'm developing a new custom FI map.
I'm heading to the dealer service dept. soon to have them set the Idle / CO mixture setting using their "Factory" Programmer tool, then I'll re-visit this thread with the results (looking to reduce "glowing red header" further).
Too bad we dont have a "sticky" thread where we post FI map results