Yamaha Zuma BWs 125 Mysterious Exhaust Bung

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Uploaded by on Sep 19, 2010

I was looking over this scooter and found a interesting bung welded onto the exhaust pipe. No idea what it's used for. So I decided to remove the bolt that sealed the hole and see if there are any power gains, or advantages.

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Autos & Vehicles

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Standard YouTube License

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Uploader Comments (wedginator)

  • its to lower emissions in europe. when its unscrewed it draws air in making the emissions cleaner. also technically slightly less power so keep it in

  • @realready2blast Thanks bud!

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All Comments (5)

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  • @realready2blast

    I was wondering what that was for

    do they use a one way valve in europe?

  • Lol, that looks like nottingham.

  • Your house must be really really nice if that house across from yours is that nice.

    Great informative videos :)

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