The way I understand it is with these bikes, changing intake (air filter) and exhaust does not mess with the fuel mixture enough to need remapping, and the oem ECU will adjust enough to safely run these aftermarket mods. Which is odd, I thought sure enough air filter, exhaust, and remap would really liven these things up, but that doesn't seem to be the case by the general consensus. I plan to read up more on this though, just doesn't seem right. Every other bike changing to a high flow air filter, more open exhaust, and remapping adds a decent bit of power. I can't see why these NC's should be any different. I need to learn more on the matter.