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I have a 2018 raptor 700 with the hmm full exhaust and the gen 3 optimizer. I looked up the modes for the optimizer and set them, however I installed a k&n air filter and now the engine light comes on when I have throttle pressed barely in higher gears. What number should the modes be on?
 

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Just move the numbers around a little bit. If you added air and caused a lean problem at full throttle, then add .5 or 1 to the 3rd number. Google symptoms of a lean/rich engine and adjust the idle, half, and full throttle numbers accordingly. You’d rather run rich than lean, but too rich and you foul your plug. Pay close attention to how the bike acts as you make adjustments and you will get a feel for where the numbers need to be. It should run fine around 4-4-3, but you may need to go slightly higher with the half and full throttle settings, the second and third numbers. Don’t be afraid to dial it up until you feel it run like crap, that’ll help you understand when it’s running good.
 
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