Why Undertail Exhausts Are Going Away Forever

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2003 Honda VFR 800 (silver)
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[@MOTOVATOR101]

The under tail exhaust was one of the top reasons I fell deeply in love with my R1.

[@davidcannon2436]

My r1 cooked my ass

[@sosathesavage6520]

@@davidcannon2436 it was damn near unbearable at stoplights or in heavy traffic I often found myself hitting the sidewalk or splitting just the get out of the traffic so I didn’t have swamp ass and nut sweat from hell

[@davidparker.2227]

@@sosathesavage6520 I ride on a CB650 to work. No way I'm going on meetings with shweddy knuts. Worst feeling ever.

[@DOORDASHINGCMOTO]

Facts it’s the reason I still have mine and havnt dropped to get a new bike

[@gameadventures1]

Same with my FZ6N

[@hellslayer9638]

under tail exhausts looks sexiest

[@blazingfire90034]

Read this as sexist.

[@Barberdan]

All under tail exhaust bike are rode by sexist! haha Let's get em! Lol Ninjarider777R I agree cut them under-engine if you don't mind a loud exhaust.

[@hellslayer9638]

@NinjaRider777R its not about loudness its about which looks better .. no offence everyone has their own prefrences

[@santosjerez1586]

Looks vs performance ,

[@jacksonjr.1400]

Hell slayer 96 yeah they make the bike look neat and clean. And there is no chance that water might get in if you crossing flood.

[@remotegod255]

Undertail exhausts will always be sexiest. You feel like you're riding a damn jetfighter :)

[@danejurus69]

@tinwoods Squid? He made no mention of the gear he wears or the lack thereof.

[@ZeroBlackfire]

One does not by a motorcycle for its trunk space....

[@johnreece5512]

ZeroBlackfire Agreed. That's what tank bags are for

[@VikingRul3s]

I actually did :P Well it was a pro anyway, so i can jam a pair of jeans down there og not overheat in my race suit on a warm day (over 24c/75f) xD Do it for Dal :P

[@randomyoutubeaccount6906]

Calamity ... then get a car. people buy cars for transportation, and a bike for fun if they can afford it. most view a Bike as a luxury that is not practical for going back and forth daily.

[@Pheonixco]

Backpacks are cheap compared to a bike.

[@jaxquill]

Neklad Australia is the perfect example (I live on QUEENSLAND), we have a gorgeous winter climate up here, perfect for riding all year round, I have a 1996 honda RVF400 & it's loves a cold morning 😁.

[@samuelfitzsimmons8907]

Taking a pretend shit at work to watch this. ❤

[@throttleitup]

So was the dude who made this video.

[@JP-iu4vz]

Haha that is hilarious sounds like me

[@EazyE11]

Ha! I'm literally dropping a deuce right now.

[@stupidassol]

Too lazy to work Too broke to quit So here I sit Faking a shit

[@raymonroe1983]

Haven't we all.

[@AT2Productions]

The reason why you feel the heat more on the VFR compared to the 600RR isn't because of the exhaust routing - it's the engine type. The CBR is an inline 4, so the engine heat is forward of you. The VFR is a V-4, so you have the rear bank of cylinders right there under the tank and between your thighs. It's the same reason Ducati's are constantly called uncomfortable because of the heat, be it the twin or V-4, that rear bank will keep the rider "warm" and limber.

[@yuzemir]

sele altı ısının nedenini açıkladığınız için teşekkürler

[@KgiMedia601]

The real reason is because it looks too cool

[@Dowlphin]

When it's actually the opposite.

[@InsanitiesBrother]

Exactly. I love it so much. My bike journey so far (british so I gotta deal with shit laws). Pulse 125 (chinese sumo) Honda CLR 125 (retro scrambler) Yamaha MT03 660 (street moto) Aprilia Dorsoduro 750 (XL Moto)

[@GasAirSpark]

You should have addressed the original reason for undertails in the first place. They first showed up on 2 stroke race bike where the engine needed long and complex exhausts for maximum power. Then it just became a game of street bikes looking like their racing cousins. Now we don’t race with 2 strokes so short pipes are back in. If anyone ever figures out clean 2 strokes long pipes will be back.

[@comethiburs2326]

i highly doubt that. not enough money, not enough interest, undesirable noise.

[@GasAirSpark]

you're probably right, but its possible the 2 stroke development going on in snowmobiles will carry over eventually.

[@joeykimball5705]

@@comethiburs2326 two strokes sound GLORIOUS.

[@GroundZ3R0Gamer]

Aren't 2 strokes used in 250-300cc?

[@j.wik.2060]

Joey Kimball , and they “smell” great too when passing by 🙂

[@Emixam70]

The 2019 Ducati hypermotard 950 went back to undertail exhaust...it'll never die, it looks too cool.

[@ihateeverything3972]

Gotta love MV Agusta for their approach to designing motorcycles. Just wish they didn't break down every gear change.

[@danejurus69]

I'll never sell my 07 600RR and partly because I absolutely love the look of the undertail exhaust. So badass.

[@kakitkam]

Owned a CBR600RR 2008 and it looks awesome! I'm a big fan of undertail exhausts and it always makes me sad to see less and less on production.

[@Bluuzilla]

they will never go away, because there will always be one in my garage

[@MotoMoose]

I definitely don't notice the heat on my CBR600RR either. But the engine throws enough heat that more than makes up for that Haha. Undertail exhaust was one of the main factors in my decision making when buying the bike though. I love the look.

[@GeneralAsimov]

Yeah the look is gorgeous, I'm surprised more mid tier bikes don't do it as they can't really be raced. Just make a super sweet looking bike that makes up for it's extra weight by making the engine 36 CC's (or whatever) bigger.

[@MotoMoose]

@@GeneralAsimov agreed. I much prefer the aesthetics of the undertail look. Nice and tidy. And for those of us that have no plans on tracking our bikes, its no big deal. My 600RR has more than enough power.

[@TofuProductionCinema]

Ditto here on my '08 RR

[@jacksonjr.1400]

Moto moose cbr 600 sounds really nice but I got the fz6 s2 because it has less higher pillion seat, so that people won't have trouble getting up (my mom especially )

[@MotoMoose]

@@jacksonjr.1400 that makes sense. I'm pretty short so sometimes I have a hard time with the 600RR. But I love the look of sportbikes too much to change to something else.

[@sleepyjessie]

It's one big thing that makes me love the look of my '09 Street Triple so much more than the newer models. It's a real shame that they're becoming so much less common.

[@R3V0LV3R45]

Buell Pioneered the underslung exhausts almost 20 years ago. I watched a video explained why he did that. He had a muffler, hugged it against his body & turned around. He then held it out arms stretched & it was harder & slower to do it. It’s amazing it’s taken 20 years for the rest of the industry to catch on.

[@Cannabis_Connoisseur]

The under tail exhaust one of the sportiest looking features ever put on a street bike. Any issues with heat under the seat can be eliminated with some cheap heat shield or a few exhaust lowering links. On the other hand a good aftermarket slip on is pricey and when I fork out the cash for one it would be nice to see it.

[@youtubechangedmyname]

Timothy Buchanan Ever own one ? After 10 years of having a undertail exhaust on my R1 , sold the bike and dont miss that part about it one bit. Love my FZ09's exhaust, I dont feel heat it at all even with full Graves titanium exhaust.

[@youtubechangedmyname]

Timothy Buchanan Nice bikes, my buddy has one, but being a 600 and single exhaust can I think they are not even close to as bad as my R1 was. Although a full exhaust with cat removed instead of just slip ons on R1 might have helped.

[@Cannabis_Connoisseur]

Lassi Kinnunen. If the exhaust was done something like what you said it would probably look pretty good. Something like on the ninja h2. I think the point of the under tail is the looks not performance. Its longer heavier and more expensive. The under tail is all about looks. With all of its disadvantages performance wise it still has one great advantage most forget about. When you low side or drop your bike like almost everyone does at some point. Your $700+ muffler doesn't get destroyed. Personally I like the way the 2015 ninja h2 exhaust design the best but it only looks better if you run a full titanium. $5000+. So in short can't beat the looks of the under tail.

[@makkamaraki7518]

I've got a cbr1000rr I never feel the heat.side exhaust look stupid and uneven.and as for Weight I don't think you can get much lighter then carbon.

[@SeamTressGaming]

It is true, the disadvantage was painful. But, I still love them somehow.

[@christophercook723]

DarkSide Ultimate because they look like 2 vaginas. A feminist plot to stop the penis look of a mans machine!

[@roadsterman]

You will still have your transformer toys to play with.

[@yashrajsingh6537]

The coolness over weighs all the cons you just mentioned

[@danchristiani]

One important thing missed - Heat from the undertail exhaust pipe passes next to the rear shock, slightly changing it's dynamics as the shock heats up. Ultimately the technology didn't exist to pack 9000 cats underneath the bike until recently, but it's safe to assume the advantages drove the innovation.

[@TofuProductionCinema]

Your quote on MV valuing aesthetics over value and performance is spot on.

[@nayibnoyola9438]

This makes me sad😩

[@sheadoesntgetit7084]

Nayib Noyola I Know the whole video has a negative outline

[@CalikushKilla]

I'm just going to act like I never saw this

[@gwot]

undertail just looks so symmetrical, balanced, and sleek! I hate having one thing on one side, it throws of the aesthetic symmetry!

[@wrangliser]

So, whatever your video was about, that 916 at 3:16 looks slick. 99.99% of us aren't motogp riders, 95% of us aren't trying to win the local road GP. But when you walk into your garage, and see that beautiful beast, that is better than any 1/10 of a second anywhere.

[@WatchJRGo]

Undertail Termignoni on my 1198 is always terribly hot... and I can confirm it doesn't help at all in the winter 😂

[@GeneralAsimov]

I agree, I've had 848 Evo and 1098 with termis, almost same bike as you and super hot. But I disagree with winter, it doesn't really heat you up but I lean back and stick my hands under the tail at every light and my God can that ever help.

[@VikingRul3s]

Where i live we got snow in the winter and basically icy roads everyday. But in the start spring and atum heated grips is freaking AWESOME! Highly recommend, but don't cheap out and buy some off brand chinese ones, buy from a decent brand and you'll love em :)

[@maartos]

U ride in winter?

[@VikingRul3s]

@@maartos There are two types of bikers: There are guys who have a bike because it reminds them of a time where their life wasn't so fucking boring and they hadn't given up yet. Then there are real bikers, who live and breath bikes. Yes we ride whenever we can

[@robposton2439]

I have carbon fiber Termis on my 748, and dont even notice them.

[@rjgiddings]

These videos are very good, well filmed, well edited- and I'm learning a lot. Thanks.

[@Duron13]

What a pleasant thing to watch a video that goes straight to the point and doesn't spend 12 minutes on bullshiting about subscribing or the youtubers own life. Thanks for that.

[@spapadillion]

Well. Honda redesigned the 600RR for 2024 (for sale basically everywhere but America) and kept the undertail exhaust. Don't worry. I'm just as surprised as you are.

[@ADRENERGlC]

Aprilia shiver 900 has it and it's a new bike

[@navinbabji]

Man i love the underseat exhaust, sad to see they are being discontinued...🙁🙁🙁

[@greenmarine5]

they will never be discontinued, they move heat away from the engine faster allow consistent back pressure , allow better air dynamics and don't get destroyed in a low side slide. In fact more and more manufactures are redesigning ways to use them instead of the side exhaust.

[@RideronthestormIreland]

My Fireblade's undertail exhaust ALWAYS makes me smile. After 8 years together not even thinking about selling her.

[@JohnB-mu9mh]

So nice to be here knowing Honda kept under tail exhaust on new 2021 CBR600RR-R (lots of Rs)

[@CoalWorxDiesel]

The only way I can see an F4 is with the undertail exhaust. But if they do redesign it would be nice to see a design like what is on their F3 with the pipes coming off the side

[@CoalWorxDiesel]

Or maybe having two on each side

[@joshualuna8562]

2019 cbr 600 has undertail exhaust

[@greenmarine5]

yup and doesn't effect balance at all and heat is not an issue for rider or suspension, but we are talking about Honda, the best engineered motorcycles in the world Bar None....I didn't say fastest...I Said best engineered.

[@the__black__box]

@@greenmarine5 honda fangirl much

[@greenmarine5]

@@the__black__box nope just speaking facts...every brand chases Honda and you know it, been that way for almost a 100 years

[@VincentAnthonyE]

I love under tail exhausts as well. On my 05 cbr600rr I removed the heat shield and never felt any heat from it. The bike did push heat to my legs from engine temps though. I had a titanium akrapovic exhaust system with carbon fiber canister at the end.

[@ankitpandey2164]

Interesting that the recently announced CBR600RR for 2021 is still keeping the undertail exhaust. I'm not complaining, I'm a sucker for these.

[@Deontjie]

The only reason why these exhausts are going extinct is because the new catalyst exhausts are simply too fat.

[@dimmacommunication]

Deon Van der Westhuizen Yeah I was thinking about that

[@iancarr722]

V4 Vtec staintune 4valve scream fightens the Devil.

[@NoOne-rg1og]

honda better not redesign their cbr 600 before i can get my hands on one. or maybe ill just buy a used one if they ever do

[@bigbuckoramma]

You overlooked the biggest reason for the new underslung exhausts. EU Emissions standards. New bikes have stricter emissions requirements, and as a result, most of the manufacturers have started putting catalytic converters on their motorcycles. These are heavy lumps of precious metals, so getting them as low as possible to negate their effect is absolutely necessary. As a result, the small "stinger" side pipes are coming back. Less materials and easier installation at the factory, all means cheaper build costs. And that is a must to offset the added cost of the catalytic converter.

[@brandenmclarty2689]

This is like I'm watching an episode of burn notice. Your voice is telling me everything I need to know in a heist smash and grab fashion

[@ronaldtartaglia4459]

My monster has a high mount exhaust, it looks awesome woth the ss swingarm.

[@Death666wish]

And yet Termignoni just made an undertail exhaust for the Panigale V4 =p

[@AntaresSQ01]

Hell i've seen undertail exhaust conversion kits, going on bikes like the R6 or the ZX6R

[@Death666wish]

tinwoods I guess Lorenzo and Dovi are squids since their Ducatis have the same exhaust set up -_- But then again, I prefer the under engine exhausts on the Panigales.

[@robposton2439]

The V4 has an underbelly exhaust, like all Panigales (other than the Finale, and Euro models with half-retardrd side cans).

[@huffingfarts]

I plan on keeping my '08 600RR for a while. I have a hard time seeing myself outgrowing or getting bored of it. It will always be more capable than I am as a rider.

[@ghosttoast8326]

On my fz6, i rode it back home from buying it on a hot day and kinda really disliked the heat from it, now it's cold here and I don't feel any of the heat either. Hit home for me haha

[@dfrost3417]

Undertail exhaust look badass

[@jonesjonz1]

Sorry to hear that, Keep all the negatives it looks GREAT!! Love looking at my VFR and love riding it. These new exhausts are laughable.

[@cbrsquid18]

2 years later and Honda is still rocking it

[@Dowlphin]

The thought of Undertail ... It fills me with determination. ❤️️

[@runnerup6936]

Italian bikes will always be style above function :)

RunnerUp Italian clothes, Italian Jewelry, Italian Cars....Italians know better than enyone how to make things with style and beauty since Michelangelo and before..

[@runnerup6936]

Sebastián Demaría and the world thanks you for it all! Even for Valentino Rossi

[@PatKittle]

Japanese make bikes as good looking as any. And as bad. Well almost as bad.

[@michaelmarshall1713]

Very true I now a MV 1000 and they design better than they ride .

[@michskip1]

style maybe, it depends on one's taste, but shitty work more then surely: Italian chromes and shines never last very long and their bikes are a hell to fix and repair...

[@troykummer1041]

:( I don't want a cbr with a stupid bazooka can on the side. Say it ain't so....wait 08's are the best. Nevermind doesn't affect me 😎

[@XFile91]

troy kummer You misspelled 03

[@Supaman1212]

@troy kummer you are a king amongst peasants! 08 cbr life!!! 😎🤘🏾

[@MJT-DA]

Vendetta V they may look good but they are slower than the new r1 and make less power. However no one can use a bike with 200hp let alone a 100hp bike to its full capacity on streets

08?? With its shitty rings and oil consumption??

[@PotatoeJoe69]

Higher weight up high on a sport bike does NOT make it harder to lean into a corner. That's why the seat position on sport bikes is as high as reasonably possible, so your body weight helps throw the bike into corners.

[@allsystemsgootechaf9885]

Fun fact, you feel the exhaust heat not only because heat rises, but on a hot day the air is already hot and doesnt rob the exhaust of its heat (obviously) on a cold day, the thick dense cold air only disipates the heat, but pushes it down

[@My-Pal-Hal]

FOREVER ??? Now that's funny. Or TESLA 🤣

[@mmazourov]

Weird vid. Almost the first statement "Moto GP bikes use undertail" contradicts the whole premise of the sweeping statement that undertail pipes are going away. How about sports bikes that are built in the full knowledge that will spend their life on the track and the stock can will be in the bin within 15 minutes of the bike coming out of the dealership (ahem... GSXR 1000). No underseat space needed, and with a carbon fibre pipe it will be light as anything. The "gasses travelling further" premise I also question, although I don't know the physics of it, but I know what my old GSXR 750 was like with a full length RS3 and cut down RS3 - the shorty robbed 6bhp off the top. I think "forever" is a strong word...

[@HeroRR]

Some Motogp bikes have dual exhausts that have an undertail and a side mount. I believe the reason for this is on v twin bikes having one of the exhaust go out the tail is easier and more compact then going out the side. Although that’s just a theory. I’m not sure why they do it.

[@mmazourov]

HeroRR I am not sure they run v2 in any series anymore... Furthermore I believe (without checking) that Honda runs one of these setups which blows your theory out of the water

[@christophercook723]

Max Mazourov GP bikes lean to much and benefit. They do not need the storage space and one only sits on them for a short time.

[@asambi69]

They run V4s, with 2 cylinders per exhaust for better pulsaltion dynamics.

[@greenmarine5]

I've never ever felt the heat from my undertail, and I run a aftermarket exhaust the weight is a fraction of OEM. I will agree that the exhaust does travel further creating slightly more back pressure, but it's non noticeable to the every day sport enthusiast. In a gasoline engine the less back pressure the easier the engine can put out the HP it's designed for. With two strokes it's the opposite. In all reality it's only for aesthetics from the days of the 80's when racing bikes were mainly two strokes and needed the extra back pressure. Companies that still manufacture undertail exhaust systems are behind the times and are not being user friendly to the rider that likes to work on his or her own bike

[@Ralph2]

Erik Buell slung the whole thing under the engine on the old XB and that is a sweet handling machine.

[@jarnosaarinen4583]

This is your opinion. Motorcross and trail bikes have had the exaust under the seat for,,,,,,EVER! They will never move them and as for road and race bikes it is just evolution some will some won't. The first road bike that had the mufflers under the seat is the Honda NR750, the bike the Ducati 916 was heavily copied from and of course the MV F4. I doubt they will change that any time soon. As far as making a handling problem at least 14 bikes with the pipes under the seat have won the World Superbike Championship, Including Ducati and Honda! Also trunks are for Elephants!

[@bullseye1470]

No likes for your ignant comment

[@dentistguba]

A lot easier to cross a ford in some extreme adventure bike without the exhaust underwater, can be done but easy to kill the engine with backpressure.

[@arjun6300]

0:42 lol a single with a twin exhaust

[@jacksonjr.1400]

Ha ha

[@pogpogcasino]

KTM engineers are mostly retards

[@mylexicon2]

Undertail exhaust has a nice aesthetic, but it’s functional as well. Superbike rules do not allow the exhaust pipes to protrude beyond the rear wheel. If engineers need to lengthen the exhaust they can route it undertail. In a racing system, lengthening the exhaust generally moves peak torque down in the rpm range. In the early days of 1000cc superbike, the engines raced at lower engine speeds. Over time, bore measurements have risen, and the engines operate at much higher rpm. Exhausts have shortened and no longer run undertail. You can witness this design phenomenon by comparing a Ducati V4R is WSBK spec to the EWC version. The endurance racing bike operates at lower rpm, and Ducati use a split undertail design. In WSBK. The front cylinders use the traditional side exit.

[@ExtremeDeathman]

A couple of issues I have with the video: 1. Ducati 916 and MV Agusta F3 and F4 are also Supersports. 2. High weight distribution actually makes it easier to corner and allows for higher corner speeds. 3. I have never experienced heat issues from any underseat exhaust when standing still. I don't believe they will go extinct... no actually I am sure, because Motocross will never use any other system. And then there are bikes like the Speed Triple wgo still sport them.

[@_baller]

Undertail exhaust ruins the lines of a sharp tail..

[@_baller]

Neito Kradavish no

[@robposton2439]

Take a quick look at the Desmosedici RR, then rethink your statement.

[@justicewarrior9187]

I DON'T CARE!!! PEOPLE BUY BIKES BECAUSE OF LOOKS AND SOUND!! THIS IS PATHETIC!!

[@grahamsmith2022]

They wasn't originally intended as a styling exercise,on the V4 two stroke 500's from the '80's and '90's Grand Prix bikes, the critical dimensions of the exhaust system made the routing through the rear of the tail unit was a necessity as it was the only available room,obviously the silencers were minimal and feather light so there wasn't much weight being transferred rearwards.

[@talhalatif780]

Great video, the cbr undertail exhaust and ducati monsters twin exhaust was my favorite, wish they still had it

[@matteosilvestri9966]

You forgot the terrible smell it leaves on your clothes, especially if you have an aftermarket exhaust.

[@robposton2439]

Not if it is tuned right.

[@chincemagnet]

When I bought my F4i, the seller was like, I have an under tail kit for this if you want to buy it? I was like, uh, no. Thanks. It already had an exhaust. I’m not buying a new exhaust for a 15 year old bike that already has one. Not to mention all the work.

[@whalesong999]

It makes sense. One benefits from experience with the qualities of both to appreciate how it affects the handling. On my first outing in the Bershire Intl. trials on an OSSA enduro back in '70, I attached a really spiffy looking round metal tool container from an old Honda 160 just aft of the seat on the fiberglass tail. I hadn't noticed it affecting the handling until I actually was underway on the first day - and it wasn't good. It affected the feel of the machine much greater than I would have suspected and the next year did away with it to carry tools somewhere else, including in my pockets. The difference was remarkable.

[@BrianKnoblauch]

Undertail exhausts were a bad idea that never should have happened. I'd be thrilled to see them go away forever.

[@Minecraftowns69]

Still gonna chuck one on my future “big” bike

[@igorchak48]

Racing bikes began using under-seat exhausts in the 1970s for a number of reasons: to cut drag, improve balance, place the outlet in the bike’s vortex for more efficient gas exit, increase lean angles and make the exhaust long without curling the pipes. Also, there are more electronics now, like traction control and ABS, those computers need to go somewhere and they usually end up under the seat. Why they went away....strict emissions.... bigger cans can't fit under the seat anymore so they have to push them under the engine.

[@stoggy4839]

Ok, so your a Honda rider so I'll explain some for you. 1. The engine makes the heat not the exhaust, so the exhaust can't be the hottest part of the bike. Don't go and grab it though. 2. More length in the exhaust doesn't mean less power. 3. Trunk space will never matter on a motorcycle. That is why internal visors are becoming so popular. 4. The heat under your seat is coming from the engine. If the heat is that bad on your wiffer and coming from the exhaust, get split seats. 5. Under tail is not more complex to remove. Its exhaust clamp or exhaust clamp. Single systems are more complex to remove. Motorcycles that look good sell better. Under tail exhaust is old so it is phasing out. Pretty soon we will all get sick of looking at "normal" exhaust and it will all go under tail again. Look at motorcycles through the years they all come and go. Under tail is not a new idea either, i think its like +60 years old now, they figured out all there is to know about under tail vs "normal" exhaust long ago. Why do you think they put these ginormous ugly ass exhaust cans that way a ton on all bikes now? Performance, Asthetics, Balance or because they can't sell the bike without it. Your a Honda rider so, its because they can't sell the bike without it.

[@moovintruespace994]

I don't have a fast motorbike but I love this look on a classic, so I'm doing it. Whatever it takes!

[@roberthoard639]

What's old is new, will definitely be back

[@venton3]

A carbon muffler was probably the best mod I ever did to my 600RR. You could pull off the track after a 20 minute session and grab the muffler with your bare hand and not get burned.

[@jamesmclaughlin361]

Erik Buell realised this before all of the major manufacturers. Mass centralisation and lower unsprung weight.

[@alexb5275]

Thank you for not making this a 10 minute video.

[@charlieryan1736]

Love the looks & sounds you get from under tail exhaust systems 👌 thanks for another quality video

[@tw1nair]

I bought myself a Ducati 848 EVO, specifically because it was one of the last breeds of Ducati with the twin pipes undersea. They are sexy af.

[@venkatjayadeepj1342]

I remember riding behind an under tail exhaust bike once, every time I got behind the bike I was treated with a face full of hot hair and a powerful blow!

[@AlexLopez-vx3cr]

Cons: More weight. My 2007 ZX10R had factory dual undertail exhaust. Mine was cut off with a shorty sidepipe though and was crazy loud. They said you could ditch as much as 50 lbs by losing the undertail exhaust.

[@OllyKilo]

Couldn't live without under seat storage on my 929. Was gonna sell for something more comfy like an MT or Triple. Ended up doing a Renthal bar conversion and keeping it. So useful.

[@saadpatel3490]

The cbr got redesigned and still has an undertail 😃

[@HeroRR]

Yeah, that was quite surprising.

[@lucywucyyy]

regular cars have their exhausts dangling down underneath sticking out one side of the bumper ruining the symmetry and aerodynamics where as super cars always have it in the centre and higher up, this is what undertails always remind me of

[@greenmarine5]

I do know the good thing about under tail exhaust is, they don't get destroyed when you low side. I have close to 55,000 miles on my 05 600rr, never had a heat issue even on those 95 degree days sitting in traffic... hell my head sweats more than my Arse as far as to much heat for the rear suspension, that's crap unless the system is poorly designed.

[@Panikass3]

The reason why they still use undertail exhausts in racing, is because of the aerodynamic benefits. It moves the C.o.P. ( Center of Pressure) further back making the bike more stable at high speeds and creating higher air pressure behind the motorcycle in order to reduce the drag force. In my humble opinion there will always be a place for undertail exhausts in racing despite the drawbacks.

[@-smp-scientificmethodpersp838]

My Ducati has plenty of trunk space (more than my other bikes), and having the exhaust mounted in the rear keeps the engine area cooler which helps ALLOT

[@terryjones6229]

If you do your own maintenance, under seat exhausts make life much easier, especially if you have a single sided swingarm. No more burnt forearms or having to remove an exhaust to get at the working parts. Much easier to keep the bike clean too. You only looked at one side of the weight balance argument (literally)! High pipes allow the mass to be centralised not dumped on one side. Own a 2019 Speed Triple and your mind will change

[@ezetheobryrorrim9909]

I dont care if its hot.... It looks so freaking awesome!!! Its not like your going on a race, where u need to go full throttle until it heats a lot.

[@JG-gh4xj]

straight to the point, no mumbo jumbo 👍

[@skmohudi708]

One thing I do hate is how the ambient heat you get from summer doesn't translate to heat in winter

[@84gssteve]

Lets not forget catalyst placement/heat issues. All bikes these days have cats and they need to be close to the engine to light off quickly and stay hot under all conditions. For simplicity and weight savings (not to mention mass centralization) its just smart to incorporate the collector, cat, muffler and O2 sensor into a tidy package and stuff it all under the engine, at the lowest point on the bike.

[@KristianKumpula]

The only time I've ever noticed feeling a noteworthy amount of heat from my CBRs undertail exhaust was when the bike was overheating up to 124 degrees.

[@cowsauce9099]

The real issue is how expensive it makes aftermarket systems. Undertail systems can be 2-3 times as much and are often hard to find whatsoever.

[@MickPsyphon]

They'll be back! Its just a matter of time, before one manufacturer decides to make a bike that looks cool with it again... right when everyone is back to side exhausts.

[@lonelynight5406]

I'd prefer undertail exhausts over side exhausts for aesthetic reasons and not wanting to burn my leg. It's a performance compromise for aesthetics and I justify it by saying that we generally want to date supermodels and not athletes.

[@hvymtal8566]

Since I saw the argument elsewhere I thought I'd try and dispel it a bit here; undertails are not necessarily better for emissions in a standard configuration. They leave as much room under the bike for a catalytic converter as a side-mount exhaust an and the extra pipe length will not have a really noticeable effect. Not that ppl with bikes that have undertail exhausts usually actually care, but some will use any excuse to justify or elevate it On a semi-related noteUnderside-exit exhausts can potentially be less emissions-friendly but that's more a matter of packaging, a clever manufacturer will shift the cat slightly forwards and the muffler slightly rearwards (or side to side, though with an aftermarket can that can affect lateral balance), and add sound deadening to the cat itself. Plus its shorter and IMO is actually much cleaner, even if it precludes a centerstand (grumble)

[@InsomniaticNotw]

I've got a 2 bros system on my 02 VFR800 and I don't notice the exhaust heat on my rear so much as I do from the pipe going up to the can. That bad boy roasts the calf on a 100 F + day.

[@salvatoredigrigoli3210]

Every statement you made is true listen to this guy he knows what he's talking about

[@jsin22366322]

They are already making a comeback. The panagali and V4’s after market exhaust are prime examples as the euro emissions will get stricter in the next years coming.

[@corona_beforecorona]

Ah but the VFR subframe was built for hardcore touring and heavy panniers. I hate the underseat space. But I enjoy the fact I can add space.