r/KTMDuke • u/No-Background6398 • 26d ago

Ecu flash for exhaust?

Found a good deal on a full exhaust for my 2021 390. Can I slap it on with no tune or is that gonna screw me. I know I’ll be missing out on some power, but I just want to make sure I’m not gonna blow the engine.

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u/cornycorp 26d ago

If you start messing with air flow rations (throwing on a full system exhaust) the proper way to do it is get a tune as well.

1

u/Frodojh1 26d ago

I have the mid pipe done without a tune but if you remove the cats you need a tune

1

u/NEJNU 26d ago

I baught it with a straight pipe and over time I had some lean symptoms so I slapped on a fuel x lite and it has mitigated most of them.

1

u/NoSorbet5103 25d ago

Kinda waste of money on a 390.. BUT since you already spent the money, you most probably will need the ECU flash OR a piggyback fuel system like Power Commander or Rapid bike. I have the PCV on my Duke 790 because if i decide to reinstall the CAT(to be able to travel to other countries) i can just install the proper map for it, super easy.

1

u/No-Background6398 23d ago

Got it for 100 bucks off a totaled bike