Why the Bus has two mufflers.

[OB_Kirk]

Knowing what I know about how vehicle manufacturers address the issue of noise emissions, I believe that the Bus has two mufflers in order to support the exhaust flow needed to get 180hp out of an 11,000 rpm 1.3 liter inline 4 while at the same time meeting noise emissions requirements. Now I don't mind making a little noise or saving a little weight, and I certainly don't mind picking up a few horsepower in the process, so I will be equipping my Bus with a Muzzy titanium full exhaust with a round titanium can.

 

[OB_godzuki 31]

Why not an oval??

 

[OB_Hayawoody]

kirk, please letme know when you get that muzzy pipe on, i was thinking of put on the same pipe, like to know what you think!

 

[OB_BusaGeek]

I read somewhere that some bikes have two pipes so that one of them is always on the opposite side from the test equipment. That way it can actually be louder and still pass noise emission regulations. I think that has a lot to do with the restricted air box. I have done the small box mod and at idle, it sounds almost like the fan is on. These things add up. I'm sure Suzuki had to choose between exhaust and intake noise and made a few compromises to get the best performance and still be under the noise limit.

 

[OB_Kirk]

godzuki 31 - It's a pound lighter and it's louder.

 

[Guest]

Im nearly ready to test the limits of the stock pipe. My valvesprings will be here today and the motor assembly should be done next week. Dyno time will follow. Hoping for over 200 HP on the tire with a stock pipe. With 1500cc on tap I think its more than possible. Should make for quick commute in the morning.

 

[Frank Adams]

Good luck Tom and keep us posted on your results!

 

[OB_byhalia]

Kirk,

What is the cost and source for the full system you will do?

I just made a 'Muzzy decision' as well. Felt a tit can on a zx9 last night, and it was barely warm after aggressive city riding at Bike Week in Myrtle Beach.

 

[OB_Kirk]

Less than $800, and I can't remember. I'll look it up and post it later. God bless.

 

[OB_JokerJ]

So my theory that the Hayabusa came with two pipes because it's not a true sport bike are false? Or is this just a theory as well?

 

[OB_Bill Koz]

There are rumors that there will be a major price increase of Muzzy pipes, due to the higher competitors prices.

Koz

 

[OB_BullDog]

..the GSXR1100, ZX11 etc had dual pipes...

 

[OB_JokerJ]

Yup that's true BullDog. And they are both classified as Sport Cruisers, just as the Hayabusa is.