i don't particularly like them. i think they looked good on the 9xx/74x but that's about it. i don't like they way they look on the hondas and the R1, but i do like it on the new zx6r.

 

I doubt that it's a fad...undertail makes a lot more sense that having exhaust hanging off the side of the bike.

 

Under tail is the way to go. Looks better, less damage if you drop it,looks better, more aerodynamic, looks better, less chance of burning your leg, looks better, even weight distribution, looks better.:crash :beer

 

it's not true about the weight distribution. it actually raises the center of gravity. undertail exhausts are purely cosmetic, and generally lose some power over the side exhausts. it mate sense on the ducs because of the single sided swing arms. the undertail exhaust on that bike, along with the single sided swing arm allowed for quick wheel changes.

 

looks good but it sure does stink up your clothes.
Riding other bikes with a side exhaust I never noticed the smell of exhaust all over my leathers, after a ride, like I do with the 05 r1

 

Weight distribution from side to side. :crash


example: some bikes have the pipe on one SIDE.
do you think the bike manufactures added a weight to the other side to balance it???

 

I like them on my V-Strom.

 

I really like the way they look. the only thing I don't like is having to pay double for exhausts.

 

I really like the way they look. the only thing I don't like is having to pay double for exhausts.

and that is why they aren't going to be going anywhere any time soon

 

nope, I love it.

 

Any issues with ass heat from the under tail pipes?

 

Sport Rider magazine had an editorial from Kent about this very subject. He mentioned many drawbacks and few good points. The only pro, imo, is the "no exhaust damage when dropped" point. I personally think the side exhausts look better, except for the Duc 916 996 998 748 family. But man, I lost count of how many cans I've gotten for my R1s over the years from stupid drops.

 

Weight distribution from side to side. :crash


example: some bikes have the pipe on one SIDE.
do you think the bike manufactures added a weight to the other side to balance it???

And what the chain and sprockets do not weigh anything? :dunno

 

i posted this same thread when the 04R1s came out, i think the undertails make the tail look like a pig-in-a-blanket:lol

 

never cared for it...
power
heat
fumes saturate clothing






I'M IN LOVE WITH THE GSXR CAN

 

I think the R1 has the best undertail of the current japs. The ZX6R looks down right funky (like a little pea shooter encased in an M16's shell). And the CBR's just are not doing it for me.

That said, I love undertail exhausts, especially mine.

 

I think the biggest problem with that type of exhaust is the bends the pipe has to make. That has to affect back pressure.

The advantage is looks and ground clearance.

Suzuki did not go with the underseat exhaust and I think they have the HP edge again. That is 1 hideous looking canister.

Guess it depends on what your prioroities are.

 

I think the biggest problem with that type of exhaust is the bends the pipe has to make. That has to affect back pressure.

The advantage is looks and ground clearance.

Suzuki did not go with the underseat exhaust and I think they have the HP edge again. That is 1 hideous looking canister.

Guess it depends on what your prioroities are.

I don't think our undertails have to make too many extra bends. Out of the header, it makes a 80 degree upward bend, then a 35 degree downward bend. Whereas the side exhaust would make 40 degree outward/slightly upward bend, and then a 40 degree inward/upward bend. Seems pretty similar to me.

Suzuki does have the hp advantage, but I think it is from the motor, not the exhaust. They went with a longer stroke than the R1, but almost have the same redline. You do the math for power.

 

I think the biggest problem with that type of exhaust is the bends the pipe has to make. That has to affect back pressure.

The advantage is looks and ground clearance.

Suzuki did not go with the underseat exhaust and I think they have the HP edge again. That is 1 hideous looking canister.

Guess it depends on what your prioroities are.

These companies are in the business to make money. Companies like Suzuki and Kaw could not make the 10R and the GSXR1000 with an undertail economically. Its a no brainer the undertail sells bikes...the two would have had to redesign the rear swing arm and take into account a number of other related changes required...they simply could not do it and still make the targeted profit on the bike.

To people that dont have it...yes its easy to say...it looks bad, or it takes away performance, im all about function, form sucks, etc, etc...

 

Nope. I love it also. I hope it says.

 

Nope. I love it also. I hope it says.

:iamwithst

 

Why put more ground clearance as a + for the undertail. So you have more of something you don't need. I personaly don't like the side can or the under tail any better than the other. I do however like the MCN type better than both. No pig-n-blanket look, no extra heat on your ass, no loss of trunk space adn no ugly, non-matching can hanging on the side of the bike.

Yes, my bike has an undertail exhaust, but I don't care what it looks like. If i cared about looks I never would have bought a V-Strom.

 

never cared for it...
power
heat
fumes saturate clothing






I'M IN LOVE WITH THE GSXR CAN

...and you're gay!


j/k


:yesnod :finger :yesnod


I love every aspect the 05 undertail.

 

People actually do bottom out their side cans on the track. Ive seen a guy nearly high side himself and the bike after his can bottomed out a few bikes ahead of me.

As for the undertail causing heat...if youve ever actually ridden an 04+ R1, you will know the cans make very little affecting heat than the frame/engine itself. I dont notice the undertail exhaust heat at all. Neather do girls on the back wearing just shorts.

 

I think the biggest problem with that type of exhaust is the bends the pipe has to make. That has to affect back pressure.

Well, that cannot be so bad. I recall having seen exhaust tubes on a race bike (I think it was a Honda MotoGP bike) bent to a circle (about 8" diameter!) to obtain sufficient exhaust length!
In fact some bends even may help to get rid of resonance problems.
The bends seen in the undertail exhaust are anything but sharp, so surelly no problem there!

I personally like the undertail and for me the 04/05 R1 does have the nicest exhaust so far.. But that's personal taste.
I didn't notice heat problems caused by the exhaust, nor did I notice exhaust fumes.
It is true that the undertail exhaust does have a potential disadvantage in weight distribution however, but who here will even be capable to notice the difference ?