FMF 4-Stroke muffler tips

Рет қаралды 4,160,625

Жыл бұрын

Пікірлер: 407

@kylestewart8354 Жыл бұрын

For all you kids out there. LEAVE IT IN. 250cc will not benefit any with open exhaust. Youll just get more riding areas closed down do to excessive niose.

@Blankname209 Жыл бұрын

Loud pipes save lives

@tristiangoodman4252 Жыл бұрын

@@Blankname209 not off-road

@BamBam99887 Жыл бұрын

That’s where ur wrong bc on my 22’ kx 250 x I put a fmf q4 and a spark arrester limits power big time like 5-10 hp big time so yes state parks might be illegal just put it back and most of the time they won’t check

@acrazedtanker1550 Жыл бұрын

@Blankname ever hear of the doppler effect? Loud pipes don't save shit lmao, they sound cool and you need justification.

@haydenpatstone2849 Жыл бұрын

@@Blankname209 not on track you squid

@philp7648 Жыл бұрын

"Any type of tool" me trying to pop a clip ring with a sledge hammer

@Wartsy Жыл бұрын

I broke😂😂

@michaelcandelaria1520 Жыл бұрын

I was looking for this comment 😂

@viktorhardindyrvold4234 Жыл бұрын

This guy is not good with words lmao

@amygallagher3552 Жыл бұрын

@Michael Candelaria

@manwithnoname734 Жыл бұрын

I prefer a hammer drill

@Wyco_Hill_Killers Жыл бұрын

That’s the most legal way bro could find to show people how to take the spark arrester out 😂

@chanceguilherme2589 Жыл бұрын

So should you take this out or no and can you do this on stock mufflers

@ThePower1037 Жыл бұрын

@@chanceguilherme2589 You can, it's just not a good idea. you'll get 2hp max, and the forest fires these things prevent is worth keeping the small metal screen.

@chanceguilherme2589 Жыл бұрын

@@Scavendon lmao def not I’m ah 69 mustang guy

@LarryVeney-hy2cu Жыл бұрын

It's not illegal if it's my dirt bike

@crimsontide9532 10 ай бұрын

@@chanceguilherme2589 he said that while sitting in his squatted turd of a Tahoe with trash can tips lmao

@ocker58 Жыл бұрын

My buddy's bike shoots flame, I don't think he's burnt down the woods yet😂😂

@ITS_YO_BOY_CAM Жыл бұрын

Lol

@Revy8 Жыл бұрын

I dont think youll b coming to update this post when he does

@ocker58 Жыл бұрын

@@Revy8 well hopefully that day never comes😂😂

@natemerzlak18 Жыл бұрын

@@ocker58 I run a spark arrester, it more of a legal thing. If the dnr sees me shooting flames Imma get a ticket which means less money to dump into my truck and bike

@ocker58 Жыл бұрын

@@natemerzlak18 yeah, I'm not super worried about it, my buddies have been riding for years and never been checked

@pinscherpower1 Жыл бұрын

Only you can prevent forest fires😂

@rendimarvellio2667 Жыл бұрын

😂

@aydenrich262 8 ай бұрын

That should be fmfs new slogan

@robertbutler5615 4 ай бұрын

Geniune question how would a dirtbike even start a fire?, I ride I got a cr85 but I don’t understand cus my bike has never backfired before or anything that could cause a fire so I’m kinda lost??

@Jcs05 3 ай бұрын

@@robertbutler5615 sparks or other hot flammable shit can travel down the pipe. Usually theres just a metal screen on the exhaust tip. removing it just makes you liable for burning down a forest

@robertbutler5615 3 ай бұрын

@@Jcs05 ah ok I kinda see now

@jakethesnake121394 Жыл бұрын

When I hear people say “engine like a little back pressure” it makes me cringe... scavenging and back pressure are two different things and no engine wants back pressure

@944LS Жыл бұрын

As soon as he said “back pressure” I knew this video was full of it 😂

@e30gangsta 5 ай бұрын

Exactly no motor likes back pressure.

@Joebauers2505 3 ай бұрын

@@e30gangsta not true there is 1 type of engine that utilizes backpressure.

@e30gangsta 3 ай бұрын

@@Joebauers2505 not a 4 stroke.

@Joebauers2505 3 ай бұрын

@@e30gangstajust glad some one got it, thank you.

@sendingit2601 2 күн бұрын

Except most bikes now come with at least some sort of expansion chamber on 4 strokes

@ChiTownGuerrilla Жыл бұрын

I trust FMF to know what they're doing, and that it serves a purpose. Leave It in, any power gain already happened from the aftermarket exhaust.

@FirstFamilyCharger 6 ай бұрын

Eeeeh but companies are also restricted by regulations

@Living_My_Life-db7fg 5 ай бұрын

It's not FmF just knows what they are doing, of course they do, like the commentor above said they have so many regulations/laws to navigate through so they do everything to make sure they comply, just like car manufacturers with catalytic converters. On the other hand if they knew it wouldn't change performance for the better they would not make it so simple to remove.

@moabsingletrack Жыл бұрын

People who think backpressure is a good thing don’t actually know anything about how exhausts work. Backpressure is always bad. The whole point of an exhaust is to get the gasses out as quickly as possible for the next cycle. Exhaust velocity and scavenging is what matters.

@coltondoescars Жыл бұрын

👏 Well explained. People do not seem to understand that exhaust scavenging is NOT the same thing as backpressure. I made a short about how needing backpressure for performance is a myth, a while back. Got comments from people telling me that without backpressure, you'll burn up your valves... It doest take that much effort to think about it for 5 seconds and realize that what they are complaining about is literally the need for exhaust scavenging... 😂

@Random-dq8ew Жыл бұрын

Amen

@cravenmoorehead5636 Жыл бұрын

Well said. Well said.

@blizzthebike Жыл бұрын

What YOU don’t understand is that without a proper tune a bikes A2F will be ruined by the lack of backpressure. That’s what we mean when we refer to that. That’s what people like you forget! Not everyone gets a tune. Backpressure is necessary without a tune.

@cravenmoorehead5636 Жыл бұрын

@@blizzthebike Thats clearly the part you do not understand. Think of it this way. An engine is basically an air pump. With that being said an air pump with back pressure is clearly less efficient than a pump without back pressure. Hang on ill post a link to a video and let a professional give you an explaination. Hold up a sec

@ashtynroney3625 Жыл бұрын

Sir Smokey the bear told me to throw those away😂

@trippjonesiii6566 Жыл бұрын

love your channel

@jordanonofer3886 10 ай бұрын

Love J's vids. Easy to follow. He explains things easy

@goinhot9133 8 ай бұрын

As he BS’s his way thru lol

@TheMontagGarage Жыл бұрын

Backpressure is a myth

@tyladube801 Жыл бұрын

I actually like the screen in there it prevents kids from dropping rocks down the pipe which is hard to remove from the exhaust

@-HUBBABUBBA- 2 ай бұрын

No, it’s a spark arrestor. It prevents sparks from flying out of your exhaust and setting off a forest fire.

@demonstare1 2 ай бұрын

That happens alot for you?

@tony4metallicaify Жыл бұрын

Back pressure is a 2 stroke thing, 4 stroke have little effect on back pressure especially with the new fuel injection system

@Random-dq8ew Жыл бұрын

Back pressure is not any engines thing. It't every engines enemy.

@tony4metallicaify Жыл бұрын

@@Random-dq8ew No! 2 stroke engine exhaust pressure makes a big difference, that fatty pipe not there for looks

@Random-dq8ew Жыл бұрын

@@tony4metallicaify Not for pressure neither

@jonathanmoulton9251 Жыл бұрын

I hear a lot of four strokes back fire. That’s back pressure.

@tony4metallicaify Жыл бұрын

@@jonathanmoulton9251 actually that is unburnt fuel loading up in the pipe then spontaneously explodes, so yes back pressure does play a roll in it, but hey man I’m not no expert, I just been working on power sport my whole life lol

@sendit9129 6 ай бұрын

Beneficial back pressure is a myth. Maximize exhaust velocity while minimizing exhaust pressure. Any amount of pressure seen at the back side of the exhaust valve is lost hp and retained heat. People mistake exhaust velocity for backpressure, velocity is what creates the scavenging effect every combustion event. The only time "back pressure" (Drive pressure) is ok is with turbo vehicles, and the ideal drive pressure is 1:1 with MAP.

@ironken1796 Ай бұрын

This! ☝️

@okerhrh4139 26 күн бұрын

So does it increase velocity then? Is it in the end still a positive mod to remove the baffle on dirtbikes? Or.. thanks for the heads up

@sendit9129 26 күн бұрын

@@okerhrh4139 The majority of your exhaust velocity is created at the header... I'd estimate around the first 12in of exhaust. In almost all cases for modern bikes, the removal/addition of the spark arrestor alone isn't gonna have a noticeable impact on performance either way. The only thing it changes is the tone of the bike, and often people get a placebo effect from that tone change and think the bike makes more power.

@llecki 6 ай бұрын

That’s the cleanest spark arrestor ever! It’s brand new 😮

@KrzyKanuck81 Жыл бұрын

It goes right in the garbage 👍🤟

@Busdude97 Жыл бұрын

Scrap metal😂💯

@TheLoneWolfQC Жыл бұрын

100%

@ChiTownGuerrilla Жыл бұрын

Yeah because FMF just through it in there for shits and giggles, they don't know what they're doing! Smh.

@MISTERSLLIM Жыл бұрын

@@ChiTownGuerrilla it is there bc its illegal to right parks without a spark arrestor....

@ChiTownGuerrilla Жыл бұрын

@@MISTERSLLIM I know? I was being sarcastic.

@DWBmotorsports Жыл бұрын

Needing Backpressure. The most common myth ever repeated in the exhaust world.

@3BrothersExtreme Жыл бұрын

Great tip

@Sackmatters Жыл бұрын

Spring retaining snap ring and a pick brother. Back pressure has been proven time and time again to do absolutely nothing for an engine.

@Jmacfann Жыл бұрын

What does do something though is a spark arrestor and if you are riding trails DONT RIDE WITH OUT ONE. Shit like that is why there are so few places to ride now. (my state has 7 that is it and you can only ride May to Nov.

@rosslefave5877 Жыл бұрын

@@Jmacfann that's insane u can't ride a dirt bike on the highway or anywhere u want??

@Jmacfann Жыл бұрын

@@rosslefave5877 Is that sarcastic?

@rosslefave5877 Жыл бұрын

@@Jmacfann I put studs in the winter and ride. Never has been a day I couldn't ride the 650 don't like to take off in the snow but keep it moving like a car. Drunken old lady with broken hip on the back on a sheet of ice fun times.

@rosslefave5877 Жыл бұрын

@@Jmacfann just don't ride under the info is the only rule I ever heard of

@jollyviking8583 Жыл бұрын

Back pressure is a myth. I hear that one more time imma smack you! Its the right kind flow! "Back pressure" would hurt the ENGINE.

@nhbountyhunter Жыл бұрын

Can everybody agree a motor is an air pump (you all better say yes). More in, more out is the simplest way to prove back pressure is bad. It is much more complicated, I know. When goin out if you speed up the air faster then goin in then you can got more in (scavenging). If you straiten the flow you can get more out buy (scavenging + resistance too). Bigger out then in (but not too big) will help. Too big can cause low pressure spots actually sucking in air from the tail pipe leading to opposing forces. You can do simple test at home with a small fan, cardboard, ducting and tape. Do it your self. See if you can increase air velocity from a fan using those materials. Its fun and you just may learn something.

@icebergcustoms7593 15 күн бұрын

Love that shiny orange ktm

@davlupo00 4 ай бұрын

Sound check?

@astontoftero3404 Жыл бұрын

the exhausts are designed to be run without the baffle, i worked at sc project for a little bit designing full race systems, we always shipped them with the baffles, but they were never intended to be left in there, if anything the increased resistance in pushing out the exhaust, takes away from the air and fuel you can push into the cylinder, meaning you get a weaker explosion, which means less power, the optimal back pressure is without the baffles, with them you're just choking down the engine

@repoman28d Жыл бұрын

That’s just a spark arrester. Really not affecting you all that much. It’s the rest of the exhaust design that’s important

@astontoftero3404 Жыл бұрын

@@repoman28d you try and get a full race spec system and run it with and then without a baffle, you will feel a difference, yes, the other parts of the exhaust have a effect too, but choking down the entire exhaust, making it move slower and there for letting in less air into the cylinder will make it run worse and produce less power

@repoman28d Жыл бұрын

@@astontoftero3404 the screen isn’t slowing flow nearly at all. It’s simply preventing a potential live spark free and starting fires. Off road guys understand and the mx guys don’t use them because they aren’t required on a closed course. The amount of power a modern 4 stroke mx bike off the showroom floor is more than most can handle and the difference felt between a spark arrestor or none is negligible.

@astontoftero3404 Жыл бұрын

@@repoman28d clearly you haven't seen a baffle, let me explain, in the muffler part of the exhaust, you have a little piece of metal that makes the diameter of the exhaust go down, meaning it chokes down the entire exhaust. It is not a spark arrestor, it is a baffle that chokes down the exhaust as a consequence of making it quieter

@kimbopslayer562 Жыл бұрын

What does the backpressure serve? Makes no sense, dragsters don't use backpressure

@afroman5531 Жыл бұрын

Its more of a thing on 2 stroke motors

@jacksonblanks8038 Жыл бұрын

It acts as an "artificial valve" in 2 strokes where air/fuel mixture may normally be lost to the exhaust. The extra pressure in the exhaust mitigates this allowing for more fuel to be in the cylinder for ignition. For anything 4 stroke mitigate back pressure. You actually want as low of pressure on 4 strokes when that exhaust valve opens

@cravenmoorehead5636 Жыл бұрын

@@jacksonblanks8038 go back to school my friend.

@jacksonblanks8038 Жыл бұрын

@@cravenmoorehead5636 get my PhD my friend. Bachelor's and masters already secured

@lesbratton Жыл бұрын

Gee, the old spiroloc, has been retaining wrist pins for decades.

@benjaminfranklinhawkeyepie9721 Жыл бұрын

No need for back pressure 😉

@GhostedEgo Жыл бұрын

I don't need help pulling out. I have a lot of kids...... Okay maybe I do need help pulling out

@yrusonoz5574 Жыл бұрын

😂

@tuvdwbdhfjsbf6828 Жыл бұрын

Or you can just scrap the whole bike and buy a 2 stroke

@ammo2960 Жыл бұрын

Why tf would one do that

@rileykelly5900 Жыл бұрын

@@ammo2960cos they sound heaps better

@julian23561 Жыл бұрын

reng-geng gang represent.

@kingtnaughty189 Жыл бұрын

@@rileykelly5900nah 4 stroke is the muscle car of the dirt bike world

@parkerw1640 Жыл бұрын

@@ammo2960 like ur pfp lmao

@QuoteFarm Жыл бұрын

We want exhaust velocity, not exhaust backpressure

@JokerInk-CustomBuilds Жыл бұрын

Don't y'all just loooove tips that go "Get the right tool!" :D :D :D

@spicydoughnut8397 7 ай бұрын

When youre an Enduro rider and your favourite band is DEF LEPPARD ❤🏍️

@HUNTER-je6qy Жыл бұрын

Motor idaman🥰🥰🥰🇲🇨🇲🇨🇲🇨

@JoeRadman Ай бұрын

“If it’s been used a bunch, it’s harder to get out” that hasn’t been my experience.

@GameOverGuardian Жыл бұрын

Got the garage apron on, serious stuff

@p.kem4018 7 ай бұрын

So you cut the spark assistor to quiet it down??? 🥺

@trippzzinx7963 Жыл бұрын

I’m listing to this song rn

@davidleonard8369 Жыл бұрын

Clip is a spiroloc. Yes parts have names.

@michaelmays9292 Жыл бұрын

Robs a lot of torque

@spongbob18 Жыл бұрын

Its a spark arrestor 🤣

@realMaverickBuckley Жыл бұрын

I know... 'Insert' .. 'Good Back Pressure' I hope this dude isnt pretending to be an engineer.

@Tatersauce247 Жыл бұрын

I pulled my baffles out of my Harley and my spark arrestor out of my 450 TRX smoky the bear told me to

@fish_R_stinky69 Жыл бұрын

lol

@ODINSxTHRONE 7 ай бұрын

Man ktms are nice ja!

@sxmNice 7 күн бұрын

It also needs high temp silicone. Without the silicone it will get popped into orbit when you go wide open (on my 350)

@Retarded_Cat Жыл бұрын

“A little tool, any type of tool”

@quartfeira Жыл бұрын

Dude discovered dbkiller

@shaneapplegate1975 Жыл бұрын

This recipe is how you piss your neighbors off

@machnonevideoproductions3630 7 ай бұрын

Back pressure is a myth. To my knowledge it was a myth started in the 1970's so people wouldn't modify car exhaust and take out restrictive emissions equipment. There is a reason race cars/ bikes don't have restrictions in the exhaust system

@yannickboucher8331 Жыл бұрын

😊merci pour l info 😊

@mxgp33 2 ай бұрын

A good pull out game can save you a lot of headaches.

@ChanceSavage 3 ай бұрын

Nice bike bro

@Izymx1 7 ай бұрын

Please a sound test

@bubaa1218 Жыл бұрын

My q4 came without it installed thank god. It still came in the package tho

@mechtech85 Жыл бұрын

Back pressure is a myth

@sachinpimpare1692 Жыл бұрын

😊😊

@bc4evernow 4 ай бұрын

Yeah that coo

@ciscoh1 9 ай бұрын

I need to replace this on my exhaust, I forgot it had one

@user-dv8wz1ji6h 8 ай бұрын

It's a dirt bike so km pretty sure that for when you do trailing or off roading In muddy conditions that filter is supposed too keep rocks an little pebbles, stuff that's not supposed too go into your exhaust but some people dont really see that useful but yeah it sounds cool gives it a little more hp. But your right keep it on for trailing.

@rico8089 Жыл бұрын

More videos like this, please.

@JScars09 3 ай бұрын

Im about to get my first bike (50cc 2-stroke) and im thinking about doing this 😂

@jaygoga9679 Жыл бұрын

❤❤❤❤❤❤❤

@claytonlambeth1445 Жыл бұрын

Just leave it in folks. No reason at all to take it out

@chancesmall7026 6 ай бұрын

What’s the point of setting it up with the insert like you do with trail bikes with it hanging out? Does it act like a silencer or something

@tylerbrothers6840 Жыл бұрын

That's a KEG CLIP!! HAHAH

@jasondonnelly8940 Жыл бұрын

Thanks 😉

@kendrickdonnelly 11 ай бұрын

Good jokes man

@JJRX450 3 ай бұрын

I took mine out of my fmf on my crf450rx a soon as it come out of the box 😂

@gothops154 Жыл бұрын

For no reason. It doesn’t make any difference it just stops sparks from flying out. “Additional back pressure” big lol dude

@sootymammal2891 Жыл бұрын

With a 4-stroke engine, the valves are all shut during the compression stroke, so you don't need any external pressure to get good compression - the cylinder is effectively sealed.

@bilboswaggens2975 Жыл бұрын

I love my yoshi. Just a set screw

@ScarfDoesGaming 4 ай бұрын

My Yoshimura is pitch black. Do i need to replace it?

@fulbabusk4734 Жыл бұрын

😮😊

@paulhetherington3854 8 ай бұрын

KTM = YZ(frame) || HRC(motor)! KTM= That's for - our family's moment! We own - KTM YSP HONDA!

@MrJamesstott 8 ай бұрын

Do 2 strokes have these in? I have a KTM 105 with full fmf exhaust

@albugabriel5270 5 ай бұрын

If you take it out, do you need to do anything to the ecu?

@greysonriegel465 Жыл бұрын

What does back pressure feel do? Sorry I ride two strokes so I don’t know.

@jth_printed_designs Жыл бұрын

"Back pressure" is a misnomer. It's not usually the pressure that is helping anything when it comes to exhaust efficiency, it's velocity. Higher velocity gasses in the exhaust help to draw exhaust gasses out of the combustion chamber through a process called "scavenging." If the exhaust is too wide open, the speed of the gasses in the exhaust drops and the engine has to work harder to push the exhaust gasses out of the combustion chamber. Any energy that is spent moving the exhaust gasses is energy that doesn't make it to the rear wheel. Now the one part that does have to do with pressure is about a pressure wave, not a constant pressure. This is usually discussed on the intake side of things, but it applies to some degree to the exhaust as well. Look up "hemholtz resonance" to learn more about how pressure waves can be used to increase horsepower.

@cravenmoorehead5636 Жыл бұрын

@@jth_printed_designs thanks for the explanation. Saved me a few minutes.

@EtherGaming604 Жыл бұрын

Idk where your from but where i live tracks are more polices than trails. If your caught removing a spark arrestor your banned from the track for life and can revieve a huge fine

@Alex-gv4sy Жыл бұрын

where are you from ☠

@EtherGaming604 Жыл бұрын

@@Alex-gv4sy BC , Canada. The California of Canada

@justinwalters4275 11 ай бұрын

But what if you do the track thing on road

@StickA-yd4fp Жыл бұрын

Pick it's called a pick.

@AmritGrewal31 Жыл бұрын

"Back pressure"

@kontrollme9034 Жыл бұрын

Always take the spark arrestor out 🤷🏾‍♂️ I like my shit loud.

@user-dm2mj7wx4w 8 ай бұрын

If he’s a second amendment guy, I’ll bet he speaks regularly about “clips” also. If you know, you know😂

@-tb8vq 24 күн бұрын

So does it make your bike louder?

@jensvincent4702 Жыл бұрын

Imagine believing that kids without spark arresters are the reason the trails get shut down and not a tyrannical government catering to crybabies.

@Tom._.498 Жыл бұрын

You can do one vidéo for one Honda crf 125

@sleepeasywithwhitenoise3860 5 ай бұрын

We Use mine to filter my tea leaves from my teapot

@OneBigPuzzle Жыл бұрын

Any kind of tool? Got my jackhammer here.....

@Rah-hv5qg 8 ай бұрын

I blew that out of my bike without any tools just gotta hit the throttle hard enough lmfao

@effyootoob8321 Жыл бұрын

When was the last time you’ve seen sparks shooting out of a tail pipe? I’ve been riding for 30 years and never seen it once.

@andrewjohns410 Жыл бұрын

My klx 300 would shoot flames every down shift

@brabbit7703 Жыл бұрын

Since when do they sell bikes with fmf pipes on them ?

@johnwhitney5353 Жыл бұрын

This clip would of been helpful in 2005 😂

@rivalsdevstuff364 Ай бұрын

My dream is to get a CRF150 but my mom won’t let me even use my money to buy one.

@zer0fks_016 Жыл бұрын

What baffles😂 I blew mine out years ago

@p.kem4018 7 ай бұрын

Dude trolling himself

@paul8161 Жыл бұрын

Yes we know bikes like back pressure..I thought I would have a genius idea of taking the baffle out of my 2 stroke...sounds lovely..so loud..went like a wet Fart.. no back pressure = slow as fuc£ performance 😂😂