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General 675 discussion Anything related to the Triumph 675 model(s), and miscellaneous motorcycle talk.

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Old 11-29-12, 19:08   #21
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Quote:
Originally Posted by phiglit View Post
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.
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Old 11-30-12, 00:16   #22
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Originally Posted by Papachristou View Post
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.
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Old 11-30-12, 02:22   #23
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No one in at least the top ten...


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Old 11-30-12, 04:20   #24
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Originally Posted by ScotiC View Post
No one in at least the top ten...


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lolwat?
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Old 11-30-12, 07:43   #25
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Rossi and Hayden running Ducati's in the top ten of 2012
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Old 11-30-12, 08:29   #26
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Let's not forget P2, P3, P5 and P8 either
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Old 11-30-12, 21:46   #27
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I stand corrected. With the pics I see they have both- side and undertail- yeah?


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Old 11-30-12, 21:51   #28
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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
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Old 12-02-12, 11:17   #29
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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...
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Old 12-02-12, 16:56   #30
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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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