I broke😂😂

I was looking for this comment 😂

This guy is not good with words lmao

​@Michael Candelaria

I prefer a hammer drill

Loud pipes save lives

@@Blankname209 not off-road

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

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

@@Blankname209 not on track you squid

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

@@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.

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

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

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

😂

That should be fmfs new slogan

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??

@@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

@@Jcs05 ah ok I kinda see now

Lol

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

@@Revy8 well hopefully that day never comes😂😂

@@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

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

Eeeeh but companies are also restricted by regulations

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.

This! ☝️

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

@@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.

Exactly no motor likes back pressure.

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

@@Joebauers2505 not a 4 stroke.

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

As he BS’s his way thru lol

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

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

@@tony4metallicaify Not for pressure neither

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

@@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

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

That happens alot for you?

👏 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... 😂

Amen

Well said. Well said.

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.

@@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

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

@@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

@@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.

@@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

Scrap metal😂💯

100%

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

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

@@MISTERSLLIM I know? I was being sarcastic.

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.

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

@@rosslefave5877 Is that sarcastic?

@@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.

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

Its more of a thing on 2 stroke motors

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

​@@jacksonblanks8038 go back to school my friend.

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

😂

Why tf would one do that

@@ammo2960cos they sound heaps better

reng-geng gang represent.

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

@@ammo2960 like ur pfp lmao

lol

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

"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.

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

My klx 300 would shoot flames every down shift

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