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exhaust

  1. Flash/PCV/Dyno Tune

    General Motorcycle Discussions
    I have a 2017 Yamaha R1. I just bought my SC Project exhaust. I need a tune. Do I just get the PCV, get my ECU Flashed, or get the bike on a Dyno? I thought I had an understanding of these, but after reading some more I guess I don’t. I’ve heard of getting the ECU flashed, and then putting it on...
  2. Decat with stock muffler - sound level increase?

    Appearance & Mods
    Hi I have a 2018 R1 that I use only for the race track. The tracks on this side of the pond typically have pretty strict noise limits. I would like to do a decat and ECU flash, but I'm worried how much the cat removal will affect the noise level of my bike. I have an option of going for a...
  3. Sound difference? Stock vs Akrapovic Slip On With Cat

    Yamaha YZF-R1 - R1M General Discussion
    Is there a noticeable sound difference between a fully stock exhaust system compared to an Akrapovic slip on, with the cats still in place? I currently have an m4 mid-pipe with the stock muffler and I'm thinking about purchasing an Akra slip on, but only if the sound is a bit louder.
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