The only reason I would give this another thought is because for my 2017 yfz450r I can’t find hardly any maps that match what I have and that is a 4.1 fmf exhaust system k&n air intake and the power commander 5 has 1 map very close to that is the gytr exhaust and gytr intake and it still bogs when you initially give it gas from an idol position but did increase my power just wish you have more options with the fuel programing side.
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Added a slip on big exhaust to my 07 raptor 700. Was bogging out a lot so Yamaha dealer recommended this. Was a little cautious because of the price but turned out to add a bunch more power and took away the fuel response problem. Durability would be higher but doesn't seem to be water proof.
always a easy install and great
I got it for raptor 700 and it turned it into a brand new monster, it definitely great for different exhaust and made it a lot louder