I have a K4 with a race can on as well.
The FI bikes all run a little rich as stock and could benefit from a remap anyway.
If you put a can on you'll usually find the torque delivery changes a bit, in some places a little choppier in others smoother, but a remap makes it all nice again and you end up with a straighter torque curver and a bit more top end power (though not much)
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