Twin Exhausts Inline Four - Why?

Won't someone please think of the children? Why do people do this?

I understand some bikes come factory fitted with twin pipes (ZZR1200, ZX14, z1000 etc.) but if you were doing the replacement thing wouldn't you be better off with a 4 into 1 than a twin system? Is it because when people just buy cans they have to buy two?

Is this still cheaper than a full 4 into 1 system or just easier?

Wouldn't a 4 into 1 be lighter?

I understand with twins or V4s that dual pipes could be the go but an inline 4 will be better off with 4 into 1 yeah?

I don't geddit...

depends if you want to keep the look? my z650 resto had 4/1 but i'm changing it back into 4/2..my Gpz750r was 4/2 and is 4/1.. but hey i'm a slut I just do want I want

Power delivery is different between 4-2 and 4-1 so it's not just about styling and weight

http://tinyurl.com/5tlyscu

Feng Shui

Feng Shui

Im with you . Ommmmmmmmmmmmmm

I love the look, especially with some after market cans.

Won't someone please think of the children? Why do people do this?

Hahaha funny funny stuff nearly fell off chair seriously

Power delivery is different between 4-2 and 4-1 so it's not just about styling and weight

http://tinyurl.com/5tlyscu

While there are differences in 4-2 vs 4-1 most systems that have twin outlet pipes normally go 4-2-1-2 or 4-1-2

Actually most v-twins even go 2-1-2 or 2-1

From my past work and all the dyno runs we did and out of all the myths we busted only crazy harley guys go 2-2 with no balancing pipe between each pipe while this picks up a very small peak hp gain it slaughters torque down low. Also the tourer harleys with 2-1-2 would lose peak power and gain no torque over 2-1 setups.

Moral of the story as long as it goes to 1 after that point its weight and looks.

Note: The above is for most motor power applications there are exemptions i.e. drag bikes, moto gps long tuned length runners per each cylinder but these still balance at some point i think could be wrong

the 4 into one allows a more equal distrubuhion through all cylinders great for power with the write pipe diameters but they do go a 4 into 2 into 1 witch gives a wider power band the 4 into 2 is more of the syle of bike they still flow good (better in standed form)but need a decent cross over to conbine all the cylinders but more weight.

Is this still cheaper than a full 4 into 1 system or just easier?

A set of twin slip-on's is still cheaper than converting to a single as you then need a full system.....Also not all companies do full system's ie:Screaming deamon do an awesome twin slip-on for my bike but no 4-1....And I can't ride my bike to it's potential so would be wasting money chasing a few extra HP so I'm sticking will the duely's hope you don't loose any sleep with my decision Tony

Cos dual pipe two brothers exhaust on a 6 look hot. Nuff said

Is this still cheaper than a full 4 into 1 system or just easier?

A set of twin slip-on's is still cheaper than converting to a single as you then need a full system.....Also not all companies do full system's ie:Screaming deamon do an awesome twin slip-on for my bike but no 4-1....And I can't ride my bike to it's potential so would be wasting money chasing a few extra HP

Its more the manner in which its delivered IMHO, I will hold my little Z up as exhibit A It aint got alot, but its delivered in a laugh-a-minute kinda way

BTW I'm not fussed, each to thier own - but I wont own a 4 cylinder bike with twin pipes

I like some 4 cylinder twin exhaust bikes. Like the GSXR1100, the ZZR1100, CBR1000F. I think they suit the bike. But, I don't think a twin exhause on a 2011 ZX6R would look all that cool....not even a little shortie under the bellypan.

Oh, and if nothing makes sense...it's OK, I'm wankered.....

Symmetry.

I thought, well I have seen it done of v8's is to take it 4 into 1 with a correctly designed exhaust will create a vacuum in the manifold and in effect suck the exhaust fumes out from the ensuing firing cyclinder, thereafter I figure it is looks and weight.

Then again I only read and watch the shows, nfi on actually putting into practice.

Some of it is to do with emission's and noise control from a manufacturing point of view.

ZX12R for example has one of the biggest single cans around and being a sports bike singles were the norm at that time..
ZZR1400 comes with 2cans as it fits with earlier model designs (symmetry) but also easier to make emissions and noise constraints.