Yamaha Zuma BWs 125 Mysterious Exhaust Bung

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.

Category:

Autos & Vehicles

Tags:

• Yamaha
• Zuma
• BWs
• 125
• Exhaust
• Bung

[realready2blast]

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

[wedginator]

@realready2blast Thanks bud!

[mikegigabyte]

@realready2blast

I was wondering what that was for

do they use a one way valve in europe?

[Linkz14]

Lol, that looks like nottingham.

[Boxer702]

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

Great informative videos :)