As long as there’s something that’s partially limiting the flow enough that it doesn’t cause the bike to run leaner due to more air being moved through the engine Then, later if you want to try and get the most out of it, you can have it reflashed by a tuner on a dyno.Īgain though, as I said above, you can very likely bolt a new exhaust on without changing any of the tuning on the bike, provided you leave the DB Killer in on whatever exhaust you get. Essentially that’s what the tuner is doing: Reflashing your ECU with their own tune as opposed to a preconfigured one.Īs soon as flash companies like FT-ECU and Woolich manage to crack into this new Euro 5 ECU, it will take no time at all for someone to compile a list of preset flashes for various exhausts and other mods, at which point you can flash them into the bike yourself with the appropriate interface hardware. It’s worth noting that the equipment the tuner is using to re-map your ECU is the exact same as you would need to reflash it. The latter will yield the best the result hands down. ![]() There will definitely be some gains to be had with a freer flowing exhaust and an optimization of the tune to accommodate it.Īs for Reflash vs having a tuner re-map the ECU… In fact I hate the stock exhaust, and as such, already have a Yoshi ordered. I’m certainly not saying the stock exhaust is best. You would have to have some pretty interesting looking maps on the PC5 for the above mentioned driver modes not to be sufficient enough in place of the ability to switch maps.Īs for the exhaust. Your comment about the Dynojet having multiple maps is valid, but because there are four different driving modes on the stock ‘21’s ECU, it’s basically like having four different aggressiveness settings. ![]() Lots of guys have plenty of success with them, I just prefer having the actual ECU handle those changes I wish to make to optimize the setup for more power, a new exhaust etc etc. I don’t like systems that fool the stock ECU because it’s a very coarse and potentially unreliable way to adjust parameters. It alters the signal going to the ECU, tricking it into thinking the sensors are reading differently than they are, thus adjusting the fuel/ignition etc A PC5 goes in line between your sensors and your ECU.
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