Why do motorcycles shoot fire? (explained with science)
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- เผยแพร่เมื่อ 10 ก.ย. 2024
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Rapid deceleration will cause the fire burning from the explotion of combustion stroke to be thrown out the exhaust valve cause things happen to quickly for the engine basically
Riaan Ferreira why doesn’t this comment have any likes 😤🙄🤷🏽♂️
Actually it's due to air entering the end of the exhaust. This can only happen with after market exhausts. Air gets sucked back into exhaust sometimes. This is where unspent fuel is and high temps where combustion can occur. This leads to backfire, "decel pop" or flames
Augustus Czar was just gonna comment the same thing. Picture exhaust smoke going out the pipe, acceleration cut, no more exhaust, empty space in pipe gets filled with air from behind pipe due to vacuum, which mixes with unspent fuel causing in combustion and under right circumstances it’s visible! Fast bike go boom, see flame.
@@RipBruv fuel make bike go fast, bike stop with extra fuel then bike go fast again causing extra fuel to go boom!
@@RipBruv but why doesn't the flame become visible with stock exhausts/mufflers?
2:18 saves you the minutes i wasted in my life that i’ll never get back
Thank me later
Will Jackson lmao HAHAHAHA
Rafael G. Bro i was so mad lmfao
2 minutes wasted in your life? You really don't have much going on for you huh?
it's too late but, thank you
I put the answer to all questions in the comments
I watched the whole video.. & I was sure you were under the influence of something till I made it to the end... lol
ok now for the actual science. when revving the bike and letting off quickly not all the fuel is burned so it dumps raw fuel in the exhaust system to be burnt by the heat coming thru from the next throttle blip, also possible with a badly tuned carberator like my 1200 bandit used to have, useless but it was fun making backfire pops at night. lol
Basically it's just unspent fuel through the short exhaust coming out of the valves of the engine.
High air flow exhausts have a chance to pull air into the end of the exhaust where high temps and combustion can occur. This is due to unspent fuel in the exhaust exiting the motorcycle. This results in "decel pop", backfire, or flames
It's called afterfire, not backfire...
Backfire are bad, and can blow up your throttle bodies, burn your filter, etc!
Backfire are bad, and happends inside the motor...
Afterfire are ok, and happends in the exhaust...
Man I really thought you had something there. Really great explanation overall 😂🤣
More fire equals faster?? So can I light my bike on fire completely to hit 300+ mph
probably yes!
yes
I’ll try it tomorrow lmao
He said with "science" 😂
LOL I'm not even going to lie you had me going for a second
at least I read the comments and had some fun.
lol you forgot to mention the flux capacitor
The fire start when the hot unburn fuel meets the oxygen out the pipe,so the fire really starts outside and goes in .
Had me in the first half not gonna lie, then you started talking about how the exhaust spitting fire somehow made it faster and then said not to believe what you said.
Same
Yeah halfway threw your Scientific
Breakdown I started laughing and thought this guy is a Nut!!! Hahaha 🤣 Good Stuff!!! 👍
What?
Can't tell if this dude is trying to joke or be serious
Wont this burn up the exhaust valves?
Question. My Vulcan has 3 inch road burners and its crackles and pops on decel. Would marbling it cause harm? Blocking the air to the exhaust.. some say yes and some say no
Waste of time...wouldn't buy from you for wasting my time.
plz tell me if we run after market exhaust like you so it is harm full for our motorcycle or not.. Is after market exhaust decrease the life of valve or not... Plz tell me
My bike shoots flames in high rpm’s with rapid deceleration in hoping it’s just running rich and I’ll just have to do carb and valve cleans more often I also have AP on my GSXR so no I don’t think it shortens the life but it can if you don’t keep up with it I’m high asf rn by the way so my bad if nun makes sense 🤣
Does hitting the kill switch on and off mid ride help create the back fire ? I have a Honda cbr double 600 with a twin brother exhaust
Pretty sure that will just shut your bike off...
Actually it will, if you're at ~3-4k RPM at least, and you have a carbureted bike. As soon as you turn the ignition back on, it will pop. That's because when you turn off the kill switch, since you're still traveling along, the pistons will continue to move up and down in the cylinder and therefore will continue to create a vacuum on the intake side. As a result, they will still pull fuel in from the carburetor, but since the ignition is off, the spark plugs will not fire, and that fuel will end up unspent, in the exhaust. When you turn the ignition back on, combustion will resume and probably the hot gasses now exiting the combustion chamber, along with the heat in the exhaust itself will ignite the previously unspent fuel present in the exhaust.
Anyway TLDR, if you have a carbureted bike, you can force it to pop by turning off the ignition and turning it back on above ~3k RPM (at least on my CB600F it's around there) or so. Depending on how long you keep the ignition turned off for, will influence the loudness of the pop. Hold it off for longer -> more unspent fuel -> "bigger bang".
I wouldn't abuse this "trick" though. Apart from potentially getting you into trouble with cops etc, idk if it's too good for the engine and the exhaust itself...
If instead you have EFI (electronic fuel injection), then it won't work for obvious reasons. If you cut off the power to the bike, you also cut off the fueling.
EFI equipped bikes though can still pop on letoff though. You just can't "force" them to do it with the killswitch method.
Xj6 já sai fogo normal com qualquer ponteira esportiva.
Lmao! Bro... I was like wth is this guy talking about?! Good one broski..
"Every time you open the throttle... spins the sprocket"🤦♂️ My man.. you were just opening the throttle.. them sprockets ain't moving
Had me for a moment lol. Fire means faster !! Let’s go !!
Stop dude. Fire door what???? 🤦♂️
Ohhh okay I want
Tell me when we fully remove the exhaust system so why flame coming out from exhaust port and flame come whenever we put aftermarket exhaust like you.. So why do flame occur is there any original cylencer back pressure difference wich allow fire to remain inside the cylinder or is there any spark time delay... Plz reply
Exhaust pop happens due to air going back into the end of your exhaust. I know it sounds crazy, but hear me out. With high flow, after market exhausts air can be pulled into the end of the exhaust sometimes. This is where unspent fuel, high temps, and combustion can occur. This causes "decel pop", backfire, or flames. This can happen on any bike with a high performance exhaust
I would love for you to make a video talking about Moore mafias pops and bang tune
You are stoned bruh? Backfire is a reason for unbalanced mixt between fuel and air. Too much air, too less fuel, or viceversa. Go to a shop to balance it! Seems fun now, but when you valves will fry...well, not fun anymore.
Backfire will damage the engine because it’s firing inside the engine, after firing won’t do anything as it’s already left the engine and is at the end of the system
Is your bike carbureted or fuel injected...??
Made no sense
You lost me when it was hard for you to make a flame come out 😂
Unburnt fuel fumes comes in contact with hit exhaust pipe, causing the fuel to ignite and combust
I love you an your explanation
I feel like I learned something today lol
2 brother what exhaust
I DIDN'T HEAR CAM OVERLAP OR SCAVENGING MENTIONED. Or am I wrong about the cause?
i dont know im not a wizard
THE SPROCKET SPINS YOU!
Wasted 2.18min of my time
Fast bike goes BRRR
Gets bike to shoot flames on wood 😂
Which bike?
You wasted my time also pissed me off not the best way to sell a bike buddy
I'm glad you were kidding, I was thinking, "what an idiot" until you said you were joking. That is a waste of fuel and potentially dangerous, not to mention illegal in many states.
Not even close
Nothing scientific about this
I got a brain tumor watching this
Lol its just a lil fuel escaping from the engine and there is a part what stops bad gasses from coming out of the exaust that ignites the little fuel coming out ez
Dudee ...
MISSFHIRINGHU SYSTEMU
Unburnt fuel.
You're welcome.
Successfully wasted the most precious 2 minutes of my life.
Hahahaa holy shiet what a good end 😂
Nonsense
Reeelease the fire!!
Wow. So unbelievably uninformative.
What uuuuuup man!?
what upppppppp
So... you dont know.. right?😂😂😂
Lmaoooooo
😁😁😁😁😉🤣🤣🤣🤣🤣this is nonsense I don't believe anything I just said
Un helpful
Just wastes my 2min here
lol
👎👎
Haha terrible
Maglti ta9lwa !!😒
😂
🤦♂️🤦♂️🤦♂️🤦♂️
Hey bro, just reported your video as Spam or misleading to TH-cam. Have a lovely day further.