Exhaust Wrap - Good or Bad - Bike TEch

[@revhead9897]

It's refreshing to watch someone who gives absolutely no fucks about monetization and makes informative, well put together videos with scientific explanations to clarify everything. Cheers, mate.

[@CRodsnare]

Revhead dOnT fOrGeT tO LiKe, CoMmEnT aNd SuBsCrIbE

[@5abivt]

Revhead except he forgot about the main pro for wraps.. reducing under hood heat.

[@mattkemp1902]

5abivt my guess would be because of the channel’s focus on motorcycles they glossed over that

[@kamikazeclaymore]

haha Right? He's drawing diagrams and I'm paying more attention than i did in my marriage counseling.

[@micyclesport]

Well put!

[@johnbeard9120]

Wrapped mine for looks. Never knew there was any other benefit. Loved the scientific explanation.

[@halley_in_stars]

dang, that was the most clear and concise explanation I've heard. excellent job sir!

[@thedirtyworkshop]

No worries mate thanks for the comment - matt

[@nop58653]

I agree except one little thing , I'm from America. So to me this was the most unclear, clear and concise explanation I've heard so far too... lol jk jk great video man

[@OutboundEscobar]

At first I was like “What?” Then I was like “huh!” And at the end I was ready to teach a class on the mechanics of exhaust systems. Well done sir, well done.

[@MrSnakekaplan]

Clear, concise, informative and without the extra bullshit nobody ever asks for. Great vid

[@OddBallPerformance]

There is a 4th reason to do exhaust wraps - thermal control. I have an air cooled dirt bike where the header pipe is very close to the cylinder body and the carb bowl. Instead of making heat shields, a good wrap helped cut down the radiant heat soaking the bowl - and maybe helped keep a little heat out of the cylinder itself. It also helps with keeping my right leg from roasting, so bonus!

[@j.acencc6273]

Very good point. On one of my Harleys the exhaust is right near the oil tank. And it burns the shit out of my pants. But the main reason I want to wrap it is to keep more heat off of the other shit. For example the oil tank.

[@BeenThereRodeThat206]

This is what i was wondering about as well. Let's say you have an air/oil cooled bandit with the headers straight in front of the block, would an exhaust wrap help cooling the block, since the moving air wouldn't be heated as much by the headers before hitting the cooling fans of the block?

[@1AXMRDR]

My thunderheaders are ceramic coated but still required shields to keep from frying my right leg. After a few years I removed the shields and wrapped them. I prefer the look and reduction of labor when I don't have to fool around with the shields. To those that worry about corrosion just don't let the wrap stay wet on the pipes any longer than needed. They dry out quickly with minimal steam production once the engine is running. Been running wrap for years now. Glad to hear that it helped performance a small bit. Thanks for the clear explanation.

[@anthonyhenry4016]

Wow just watch this as I am investigating wrapping my 1997 Kawasaki VN800 after converting to a bobber and wanted to understand the pro's and con's and watched other vids but yours was excellently presented easy to understand well done.

[@gcanaday1]

Doing exactly the same to my 98 right now. Complete rebuild from frame out, and I'm planning to wrap.

[@tuneup858]

I am mechanic who fitted the exhaust wrap for customer bikes, now I can explain the reason. Thank you

[@chidvi9]

omg you literally replied to every question in the comment. you are a good man

[@thedirtyworkshop]

yeah but not this one lol

[@oneguysopinionyup7252]

@@thedirtyworkshop 🤣🤣🤣

[@galuhrichata6148]

Best explanation so far.. scientific, but simple as well.. now, I don’t hesitate to wrap my motorcycle exhaust.. Thanks, Man...👍🏼👍🏼

[@bringman23]

By far, this was the most beneficial video on that matter. Would be great if other "explained" videos are done the same way!

[@someoneelse318]

This appears on my recommendations since weeks. Now that I opened it finally I hope youtube is being satisfied at last and stops recommending it to me.

[@DumbCarGuy]

My dad bought me that exact shirt back when i was in the 5th grade.

[@droptuned83]

What ? You sayin he nicked it off you? Or did you give it to him?

[@V742]

Either he was terrible at picking sizes or you were a real porker

[@Group_Anonymous]

Droptuned 83 he is implying this grown man is wearing kiddie type shirt 🤣🤣

[@JayDAnderson]

You still have it? I would like to buy it.

[@DumbCarGuy]

@@Group_Anonymous 20 quid and its yours

[@vinodguptamd]

Most comprehensive review of exhaust wrap

[@seangavlas7833]

I enjoyed the exhaust scavenging explanation. You must be a scientist or engineer - much appreciated!

[@damianpatrickmcnamara6954]

Thank you for boosting my confidence, I feel more intelligent, of greater interest, my looks improved, my speech ability stronger and my dress sense sharper than before, thank you.

[@minbannister3625]

because it covers a multitude of sins and rust

[@bikingwithgrantygrant779]

Really great video. I did wondered why people wrapped exhaust other than for looks. A brilliant explanation. I have to say I do like the look of exhaust wrap.

[@viarnay]

at 1000 rpm the engine has 500 explosions inside the cilynder. That's very fast

[@blogengeezer4507]

@@viarnay -Could be one historic reason for general aviation, those with internal combustion, having a few issues contacting dirt... more often than planned ;}

[@AluWalaNaan]

Thanks for such clear and precise explanation. I just bought my first 125cc and the previous owner had wrap around the exhaust. Made me curious about its puepose.

[@toadamine]

Reason most people wrap... Dented pipes! 😂🔰

[@206-HoneyBadger]

Excellent video for those considering pros and cons of wrapping exhaust.

[@vastianocara1792]

on my husq 510 i just did a double layer 25 cm long next to my leg. no change in performance but now i dont cook myself when im stopped at a traffic light... 3 years later and i havent had any problems

[@danieldeutschen]

Vastiano Cara the power differences are so small you don't notice them. You can probably just notice them on a dyno

[@vastianocara1792]

i dont know, never had it on a dyno. but anyway as you said difference too small to notice, apart from my leg :)

[@danieldeutschen]

haha yeah :d dont get yourself burned! :D

[@mrbigstuff6149]

Thanks Matt the only guy that did it that I have asked was on a v twin cruiser and he said it was to avoid burning his leg. I used to see a lot of two strokes with home made race pipes at club races and they were invariably black and metal. Didn't know it caused corrosion, thanks.

[@drewjohn6847]

I just subscribed after watching a few vids, very knowledgeable and easy to understand and easy to listen to....well done....

[@fredblue5068]

The grin at 6:34 "melted leather" - priceless! Great explanation.

[@jessicaphelan-shelswell68]

You're a cluey fella. Keep up the videos, perhaps one where you pull apart different 2stroke japanese power valves and explain each. I really enjoyed the Kx series.

[@megarocksam]

Wrapped today my RoyalEnfield look awesome

[@thedirtyworkshop]

send me some pictures, they'll go in a video

[@trickym5748]

Seriously

[@voidjord234]

Very well done, love the white board support

[@thedirtyworkshop]

Thanks for the comment dude, happy you liked it - matt

[@deerock8545]

Beautifully said thank you

[@theodoremarakas9899]

Thank you for the informative video that isn’t filled with bullshit blah blah, theatrics and annoying music. There are people who look into KZbin for information and testing, or even instructions on how to use a product or want to know their experiences using it and the down sides. Sir, you have delivered, enough said....

[@pugestpug5879]

Tbh I like the wraps on bobbers and didn’t know the purpose of them until now, thank you and now I might wrap mine when I build my bobber

[@MrDavew402]

I was waiting to hear you mention something about tuning after a wrap, because i would think the engineers knew there was 10% exhaust gasses left and if you change that ratio by wrapping, wouldn't you need to re-jet or at least adjust air-fuel mix accordingly ?

[@thedirtyworkshop]

No, because it makes such a small difference that it might as well not exist

[@I0ITuGI0I]

I had exhaust wrap on my 125, I painted the exhaust with VHT paint first and cured that, then I applied the wrap, after a very wet and horrible year I removed the wrap as it started to go white from heat and found my exhaust looked just as good as when I painted it. I think a lot of people forget to paint or protect the metal, as said the wrap will hold water when not running and so on.

[@OleMossyHorn]

Exactly. Also, never put the bike to sleep if the wrap is wet. (Caught in the rain on the way home) Let the bike idle and the exhaust wrap will be bone dry in no time.

[@jacksmith3189]

Excellent video Thanks

[@williardpalomar9092]

Points taken Sir..thanks for the thought..Cheers..

[@thedirtyworkshop]

No worries mate thanks for the comment

[@GraWard]

Great video Matt, this series of Bike TEch is really good.

[@thedirtyworkshop]

cheers dude, at least I'm doing something right - matt

[@ctpctp]

Just to toss in my 2 cents, in car applications it does a good job of keeping the temp down under the bonnet. I put in on my MG's header for this purpose. Also the protection from burns factor if I am adjusting carbs while the engine is hot.

[@K0nst4nt1n96]

Very well explained. I had a 500cc Scooter where the frame would get incredibly hot in summer on long rides. Suddenly you would loose power and had to wait for it to cool down again. I found out that the exhaust was heating the frame and the frame heated the ignition coil. Wrapped the exhaust and the problem went away.

[@zacharydimiceli7820]

Very Very well said

[@thedirtyworkshop]

thanks for the comment dude - matt

[@Wahiuhu]

Finally! I'm going to do the heat wrap. Awesome video man!

[@thedirtyworkshop]

No worries dude - cheers for the comment

[@thedego22]

great video matt! well said.

[@thedirtyworkshop]

Thanks - matt

[@Estebeezy]

Skottie delago does anyone know if you can wrap it with a heat shield on ?

[@rodneystephenson7693]

Here in Vegas it never rains so maybe nice here. I could see how on the coast with high humidity and frequent moisture that it could ruin pipes over time. Long live the Vegas riders!

[@usefulcommunication4516]

Prof. Cox of the motorbike world. Nice job.

[@zedex1226]

says the dude sporting a 10 year old's cowlick in this very video.

[@eliinthewolverinestate6729]

Exhaust scavenging 101. Thus why small header opening and exhaust getting bigger towards end to help speeds and hopefully create small vacuum before intake opens. Heat shields may work in some cases to block heat. My 360 has wrap so i don't burn my leg. Great video.

[@michaelbradshaw2069]

exhaust wraps are supposed to be coated with a silicone spray after installed so they do not absorb water

[@1-shotslinger108]

That would stink to high hell as it burns off.

[@michaelbradshaw2069]

1-Shot slinger it's a high temp silicone that won't burn off but seals the wrap so it doesn't absorb water and deteriorate

[@1-shotslinger108]

What is the brand name of the stuff ?

[@michaelbradshaw2069]

1-Shot slinger DEI Hi-Temp Silicone Coating

[@1-shotslinger108]

Thanks I'll try to get some.

[@charlie_sin_mag]

Is there any great risk to keeping the exhaust gases hotter for long as far as the engine goes? Are the cylinders likely to get hotter and could it potenially damage internal parts?

[@thedirtyworkshop]

No, dimple because the engine is generally overcooled by design.

[@davidstancomb5380]

Another good reason for exhaust wraps in this day and age is that the catalytic converter is more efficient at higher temperatures, so you want the exhaust gases delivered to the cat to be maintained to (as far as I remember) about 375 degrees C.

[@micyclesport]

Excellent explanation!

[@marcosalmeida5402]

you rocked it on the explanation buddy!

[@CHIBA280CRV]

Excellent explanation thank you sir.

[@liberty9348]

Hello, great video. Clear, concise and confident. I'm facing a challenge and I'm wondering if wrapping the pipes will improve the situation and if there is anything else that would be better. Explanation: I have a car with a mid-engine. The engine bay is cramped and has four walls. The bonnet comes down and has a seal all the way round so it builds a 5 sided box. The only "open" side is beneath the engine. There are no vents in the bonnet and as we all know, heat RISES. The vehicle also has a turbo which I've measured to reach temps of 1500'F on the hot side. The bonnet also doesn't have any vents and there is no where for the heat to go besides out the bottom through high pressure and lack of space/volume. HOW can I get all this heat out of the engine bay and lower the total engine bay's temperature? Thanks

[@thedirtyworkshop]

Measure the temp in the engine bay - it's not sealed but if you have having engine bay heat issues - then vents or the dreaded cold air intake that is actually from the from of the car

[@liberty9348]

@@thedirtyworkshop uhhhh seems like you're replying while hammered :P So how do I get heat OUT of the engine bay?

[@thedirtyworkshop]

What do you mean? There's no such things as a heat vacuum or anything - you have to flow air through the engine bay.

[@thedirtyworkshop]

The biggest issue with having a hot engine bay is hot air being drawn into the engine - at any rate - this is a bike channel - fuck cars

[@liberty9348]

@@thedirtyworkshop Ah, didn't realize that. Found the video on a google search about exhaust wrapping. I see the "Bike TEch" now. Thanks for clarifying.... This was one of the first videos I watched... after more research I now know that wrapping is an inexpensive way to keep the heat in the exhaust pipes. I'm sure ceramic coating is superior and will be going that route.

[@Shan-sg7mm]

Excellent explanation

[@dirtbikedebbie8882]

This was super helpful, thanks pal.

[@nagyandras8857]

YESS finally someone who knows what makes a turbo work, it is a pleasure

[@gizzync1525]

Turbos are easy, Clarkson said it best . "Air goes in here. Magic happens & you go faster." lol

[@nagyandras8857]

i mean suprisingly many people think a turbo spinns by flow, and never even imagine its a waste heat energy recovery device. what hurts is they are nowdays mostly utilised for no more than stuffing more air into engines. terribly wrong. sure if you want power and fuel economy is not in your interest it is a hefty idea, however.. there is a limit what you can achieve. and a lot of heat energy is still there, you could do turbo-compunds.. nowdays you could absolutely get an electric generator powered with a turbine and use that to power an electric motor. turbo compounding has been done in the past but pure mechanical solutions simply made it have a narrow range of being usefull.. however we can play with coupling by dc-dc converters, and variable gemoetry turbines. (actualy it allready patented so good luck seeing this emerge anytime soon) . hydraulic coupling was given a go but it was clumsy and not efficient enough. actually i don't really know any kind of internal combustion engine that would not enefit to some extent from a turbo.. even if it does no more than reduce the "pressure loss" of the intake system. in fact many tractor engies get to have a turbo for nothing more than that, "boost" pressures in the range of 0.1-0.2 BAR or so... since they don't swap pistons out and not modify the fuel system to account for any extra pressure. what they get is better fuel economy. and when you burn like 50-100 liter of fuel a day, even 1% is a lot. ust-kamenogorsk.all.biz/en/turbocompressor-of-tkp-6-tt01-mtz-g1670520#.WT3HK7-1H3g these run for a funny 250 euro -ish. sure 61mm is not a really lot but it gets the job done.

[@gizzync1525]

Yeah. I was just joking with you. I had the idea of electric turbos about 6 yrs ago, but was convinced by someone I trusted "the math wouldn't work" . They are also good for cleaning up emissions. I won't lie, I'm no turbo guru or anything. i know little more than the basics.

[@nagyandras8857]

gizzy nc electric turbo is not impossible, just plain simply useless.

[@gizzync1525]

It was more electrical assistance to eliminate lag. I've seen a few working examples

[@Troph2]

Great for remote turbo setups on cars, keep that gas hot and spools faster, same with turbo blankets.

[@djmexim]

Nice one! Clear explanation. Subscribed sir! Any videos on fixing RG500 ignition coming up? No spark on mine!

[@danielcroft7653]

One of the main reasons it was initially used was for power, but for cars, not bikes. If you wrap your exhaust you keep the heat in the gas flow as you've said, but importantly you keep it away from your engine bay. Increase in underbonnet temperatures will reduce power as the hot air is less dense, therefore to get stoichometric air/fuel ratio you have to add less fuel and so get less power. Colder air at the intake = denser air = more fuel needed to get to the correct air/fuel ratio and more power. Turbo/super charging works on the same principles, only to much greater effect as the change in density is much greater due to being mechanically forced, rather than driven by a simple temperature change. But in racing every 0.5 bhp counts! I know yours is a bike channel, but thought it was a worthwhile point to add a bit of history. Interesting video though.

[@cibsim]

Clear explanation. Bon exposé, très professionnel !

[@SoundwormBite]

Great video, i'm gonna mummify my exhaust it looks badass!

[@ZX7ROB]

Always the best place to come for genuine practical info! What do you think about using this to reduce the average coolant temp on my R1? I’m conscious that the headers are really close to the radiator and it does run hot…. Failing that is it worth using it around the underseat exhaust pipes to cool me arse down?

[@thedirtyworkshop]

You need a doule skinned heat shield with an air flow between the two.

[@christer-c-knee8021]

Very well detailed explanations! Thx u

[@binhonz]

Done a wrap once on a Yamaha XT225 I had but just on the first portion of the exaust. It looked awesome and people thought I had modified the engine somewhat (which I hadn't). The plus side for me was that it eliminated the heat around my right foot which in a hot country like Brazil, it's a big gain. Cheers and excellent video mate! Can't stress this enough. Love your work.

[@thedirtyworkshop]

Cheers dude - matt

[@stephboeker7835]

I wonder if the protection is as good or better than shields. Does the wrap keep the heat in the pipe and feel cooler on the legs than the shield ?? Thank you for your generous consideration, Sincerely ........................

[@gustavooroza]

Thanks Matt, very interesting video. I only can add that this thing is cheap and reversible; and it doesn't make any bad to the bike; so if you want to try it then try it, in any moment you can take it away. Regards from Argentina

[@thatguycalledart6270]

would this make your bike warm up faster, I don't like to ride my 2 strokes without them properly warm and reducing this time would be good thx

[@thedirtyworkshop]

Yes it would but nothing like 50% faster - but yes it would

[@TheUKETrain]

Clear and well presented. Thanks.

[@paulforst8274]

Brilliant vid mate, glad I found this chanel

[@davem5333]

A wrapped exhaust system may have more back pressure due to the fact that the exhaust gases remain hot longer. As the gases cool, the exhaust gas contracts, flowing more freely out the pipe. Exhaust pipes on turbo systems are rarely wrapped because it causes too much heat to be retained in the exhaust system, causing the turbocharger center section bearing to fail or the oil to coke up.

[@willyck948]

I had a problem with wire harness melting from exhaust heat and the wrap did the trick. I did the exhaust with wrap and used spark plug heat shielding (same make as the wrap) and works great. The intake manifold stays cool as well witch doesn't help fuel milage but improves torque for when you have to hall 1000 pounds of tractor, rider, and equipment up steep hills👍

[@nitheeshdavu9816]

Does it benefits from engine heat

[@kenmc9049]

Excellent video! Very informative.

[@kamikazeclaymore]

Great video. I'm doing a ground up rebuild on my Vstar after laying it down and exhaust decision was in the air.. Gonna wrap for looks and I don't wanna drop half a K on some new V & H shortpipes ATM. Plus that whole cruiser with hot melty pipes thing does suck..

[@crestaenine]

Great stuff mucker. Love the technical explanation. Who are the 300 losers who give it a thumbs down? I'll make a donation to a mental health charity to make their lives a little better.

[@iankeith763]

Great explanation. My MR2 currently has wrap and it's all falling off. Perhaps I just remove what's left, and have done with it. As a personal thing, I think exhaust wrap looks horrible. As I final note, I am getting up 70, and was a Rocker, Cafe Racer guy. I never ever saw anyone have exhaust wrap on their bikes. Maybe an American thing, I don't know, but not Cafe Racer.

[@700horses]

*Pro Tip:* Before wrapping your headers, scuff them up, prime them with high temp primer, then paint them with high temp paint. This will protect them from moisture/corrosion.

[@wasupfool5692]

I just had mine ceramic coated first

[@Jsebs]

Thanks! Nice Tech vid! How about engine temperature? I do have exhaust wrap and I feel like my XL1200X tends to be on the hot side. But can't compare on temp of before the wrap cuz I didn't have temp reading at that time. Thanks again

[@thedirtyworkshop]

Yes it will do. If the exhaust pipe is heat saturated then the engine has less thermal mass to dump the heat into - we call this 'thermal load' in other words the flow of heat

[@Jsebs]

Enough heat / too much heat to damage the engine or just more than normal

[@daveallen2325]

Very informative.

[@thepandefamily]

Awesome tutorial/explanation for folks like us Matt. Nice one. Ride safe mate.

[@thedirtyworkshop]

you to mate - matt

[@thepandefamily]

Give us a shout if you're going past Nottingham... would love to pick your brain!

[@bayradian]

Very good video, well done , I don't even own a bike.......but when I get one , I'll wrap the pipes :)

[@alphaforce6998]

The main practical reason to use exhaust wrap is to mitigate heat soak. In cars, wrapped headers will reduce underhood temps, which can then result in more power by allowing you to advance timing without incurring detonation. In turbo cars, cooler temps can allow you to reliably run higher boost. On motorcycles, the exhaust pipes often run by the oil pan, your legs, and other things that work better when not cooking. If your bike is air-cooled, keeping hot exhaust gases away can open up similar tuning opportunities as with cars.

[@LJ-fe8vb]

Wrapped my pipe to not melt any more winter clothing :). I think it looks good on the on my bike, scared to take it off and look under the wrap though ahah:p

[@hobbypyromane2.05]

Great explanation! But what happens if I wrap my 2 stroke exhaust with it?

[@jimmybe64]

Great video. Do exhaust reverson cones work?

[@Wilde83]

I always thought wraps were just to prevent burns to the leg haha, I don't like the look of it but the paint on my pipes were damaged in the post and the seller took no responsibility so I am thinking of wrapping to cover it up.

[@michaelyiannett1768]

Very well explained. Thank you

[@miacsasailep292]

Very well explained.good job sir.

[@yajnaamakusa8786]

Thanks for the explanation! Great presentation.

[@thedirtyworkshop]

Cheers dude, but you should see the outakes, the amount of times I get tongue tide is amazing

[@DavidHunter-n8p]

I have a Triumph GT sprint which puts out a lot of heat from behind the fairings. I wonder if the heat wraps would nullify some of the heat to make it worth it?

[@angelomaurizio1668]

Would wrapping my pipes prevent from burning my leg again? My calf tends to lean on the exhaust pipe while riding.

[@thedirtyworkshop]

Yes, well at least reduce it

[@streetsquiid5615]

Does exhaust wrap actually reduce the heat generated inside the combustion chamber?

[@Bansidhe]

Thinking about doing this on my Pan 1100 downpipes. Reckon I'll get some heat paint on first though and then silicone spray to "seal" them.

[@gewizz2]

does it make the exhaust quieter?

[@thedirtyworkshop]

No

[@franzelfelix5493]

Thank you for making sense.

[@TheDioginese]

Great video. Thanks

[@DistinctOgre]

Ho Lee fuck! Lol. I never seen these old videos. U were so lost and nervous compared to now. Are you wearing that same shirt today? Happy birthday, buddy. You've come a long way.

[@GPTVIBHU]

Brilliantly explained

[@thedirtyworkshop]

Thanks dude - matt

[@ronanrogers4127]

Excellent description...could you continue the explanation about speed of the sound wave/efficiency of scavenging, with respect to other aspects of the exhaust...mainly the impact on scavenging of removing or downsizing the cat, and the impact of pipe diameter? That’s the age old problem many people try to solve to increase power (along with tuning the length of the exhaust). As it’s possible to buy E marked cats that are much smaller than OEM, and which fit inside the diameter of the header pipe, it’d be interesting to know the impact of removal or downsizing on scavenging : )

[@DavidArellanoSTP]

loved the explanation mate!

[@moorshound3243]

wonderful vid dude, I don't know if I want to do it now? never thought of the water retention thing before.