Under-Tail Exhaust: Almost Gone and Good Riddance - Page 3

twistyrider · 11-29-12, 18:08

Quote:

Originally Posted by phiglit

I have been curious why bikes have the intake and exhaust ports facing the wrong directions, packaging wise. Why not put the exhaust headers facing the rear? I can understand heat being a problem, but having the exhaust coming out the back of the cylinders would shorten the exhaust length significantly. And putting the intake on the front would make sense if you could put the air box and plenum where the headers used to be.

It would exacerbate the heat problems coming off the headers and roasting your ass, but isn't that a problem we could get around by now with shielding and header wraps or coatings?

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Yamaha tried that on the YZF-450 only lasted one or two years before they went back.

Shamrock · 11-29-12, 23:16

Quote:

Originally Posted by Papachristou

unless you are riding motogp, it is also undeniable that you will not notice/need the advantages.......

Uhm, the last time I saw MotoGP bikes, they have undertails, too. Along with low exhaust.

ScotiC · 11-30-12, 01:22

No one in at least the top ten...

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WiK1d · 11-30-12, 03:20

Quote:

Originally Posted by ScotiC

No one in at least the top ten...

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lolwat?

Tucker2.0 · 11-30-12, 06:43

Rossi and Hayden running Ducati's in the top ten of 2012

WiK1d · 11-30-12, 07:29

Let's not forget P2, P3, P5 and P8 either

ScotiC · 11-30-12, 20:46

I stand corrected. With the pics I see they have both- side and undertail- yeah?

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Tucker2.0 · 11-30-12, 20:51

Yup those run both, the ducati's run a 2-1 pipe under the tail basically.

Of couse im sure those exhaust systems are feather light so there wouldnt be much of a difference. Im sure engineers somewhere working for ducati or whoever to minimize the downsides to undertail exhaust

D675Chuck · 12-02-12, 10:17

Like others - i love the look of the undertail exhaust and having less than 10,000 miles under my belt I don't even dream of thinking I could tell a performance diff. Understand why they'd go that way though...

jardineD675 · 12-02-12, 15:56

Definately true guys, undertail is way better for looks, and yah never thought about how the placement keeps it safe for a crash, dam that would of been a bummer on top of everything else on my slide.

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11-30-12, 01:22	#23
ScotiC Junior Member Join Date: Sep 2012 Location: Beaverton Posts: 79	No one in at least the top ten... Sent from my iPhone using Motorcycle.com App
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11-30-12, 06:43	#25
Tucker2.0 Member Join Date: Jun 2012 Location: Hickory, NC Posts: 504	Rossi and Hayden running Ducati's in the top ten of 2012 __________________ 2007 SV650S -RIP suziQ 2010 Daytona 675SE -I miss my SV, but damn that daytona! 1980 Honda cm200t (running work in progress)
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11-30-12, 07:29	#26
WiK1d Member Join Date: Mar 2010 Location: South Africa Posts: 701	Let's not forget P2, P3, P5 and P8 either __________________ www.bertusras.com \| @bertusras '07 Derbi GPR125 2T \| '07 Triumph Daytona
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11-30-12, 20:46	#27
ScotiC Junior Member Join Date: Sep 2012 Location: Beaverton Posts: 79	I stand corrected. With the pics I see they have both- side and undertail- yeah? Sent from my iPhone using Motorcycle.com App
Status: Offline

11-30-12, 20:51	#28
Tucker2.0 Member Join Date: Jun 2012 Location: Hickory, NC Posts: 504	Yup those run both, the ducati's run a 2-1 pipe under the tail basically. Of couse im sure those exhaust systems are feather light so there wouldnt be much of a difference. Im sure engineers somewhere working for ducati or whoever to minimize the downsides to undertail exhaust __________________ 2007 SV650S -RIP suziQ 2010 Daytona 675SE -I miss my SV, but damn that daytona! 1980 Honda cm200t (running work in progress)
Status: Offline

12-02-12, 10:17	#29
D675Chuck Junior Member Join Date: Oct 2012 Location: Bay Area Posts: 45	Like others - i love the look of the undertail exhaust and having less than 10,000 miles under my belt I don't even dream of thinking I could tell a performance diff. Understand why they'd go that way though...
Status: Offline

12-02-12, 15:56	#30
jardineD675 Member Join Date: Dec 2012 Location: sacramento Posts: 206	Definately true guys, undertail is way better for looks, and yah never thought about how the placement keeps it safe for a crash, dam that would of been a bummer on top of everything else on my slide. Sent from my X10a using Motorcycle.com Free App
Status: Offline

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