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Old 11-28-12, 01:40   #1
maximus108
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Default Under-Tail Exhaust: Almost Gone and Good Riddance

Just read this article about how under-tail exhausts are supposed to be an "abomination".

http://blogs.motorcyclistonline.com/...#axzz2DUoMwBAw

I find it funny how despite the Daytona having an under-tail exhaust it still gets the highest marks in most comparisons.
I still love the symmetrical look of an under-tail.
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Old 11-28-12, 01:47   #2
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The person that wrote that makes good points and picks performance over style, which I dont blame him, the undertail is for looks and always has been. Most street riders it won't make a difference where the exhaust is, but since these bikes are made for racing I can see why everyone is going lower.
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Old 11-28-12, 01:50   #3
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I have to say, it's nice to not have my ass fried with my low-boy exhaust. I do like the look of an undertail, but the blog makes sense. It is interesting to see just about every maker going midline/under engine these days.
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Old 11-28-12, 02:42   #4
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But but but...its not frying my ass, and I love the look.
Oh well, I'll just stick to pre-unabomination Daytonas then.
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Old 11-28-12, 04:59   #5
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For me, it torches my ass when I'm in traffic. Added some water wetter helped a bit. At PIR there is a decibel meter that's less lenient on undertails based on the location of the meter. I prefer the lowboy look not to mention the performance advantages. I've yet to go down but I'm thinking the undertail would come out better than lowboys tho. But all said and done i like the lowboy. Blasphemy!!!!


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Old 11-28-12, 05:35   #6
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Heh no wonder they have to give their magazine away.
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Old 11-28-12, 08:24   #7
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i've always loved the look of undertail pipes.
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Old 11-28-12, 09:44   #8
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Well, aesthetics aside, the advantages of a lower, shorter, mass-centralized exhaust are undeniable.

There comes a point where improving the performance means making changes that some of us might not like. The old bike is so good already, they had to find gains somewhere. The exhaust was one of the few obvious areas for improvement.

You can be assured that if Triumph didn't try to move the bike forward, there would be a very loud outcry when the bike was finishing fourth in comparison tests.

Besides, the idea that the Daytona was somehow unique because it had an undertail exhaust is not really true. Ducati really adopted it for production bikes first. And the CBR600RR still has one. Plenty of other bikes had them and most abandoned them.

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Old 11-28-12, 10:28   #9
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While i enjoy performance i will really never need to eek out every ounce i can find, because im not the kind of guy to hit the track. The difference between undertail and low-slung exhausts will be nearly non existant to me at my level of riding, even in the mountains.

This bike is already outperforming my needs in every aspect. So i dont feel a real urge to argue over the drawbacks of exhaust placement.

How many of us REALLY ride this bike to its limit anyway?

Now i do like the fact that if i low side my bike, there is a very good chance the exhaust will come out fine because it is an undertail exhaust. I also like that fact i dont have burns on the inside of my calf/ankle like i did on my SV650s.
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Old 11-28-12, 11:15   #10
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Quote:
Originally Posted by Trip View Post
Well, aesthetics aside, the advantages of a lower, shorter, mass-centralized exhaust are undeniable.

There comes a point where improving the performance means making changes that some of us might not like. The old bike is so good already, they had to find gains somewhere. The exhaust was one of the few obvious areas for improvement.

You can be assured that if Triumph didn't try to move the bike forward, there would be a very loud outcry when the bike was finishing fourth in comparison tests.

Besides, the idea that the Daytona was somehow unique because it had an undertail exhaust is not really true. Ducati really adopted it for production bikes first. And the CBR600RR still has one. Plenty of other bikes had them and most abandoned them.

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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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