yes i believe i toke the rest of the junk out and there is only one tube left and the hole at bottom of air box also the block off plate is need for exhaust port
no it is not necessary this mod just holds door open for free air flow, i have removed all the other AIS for the bike it, just for the hell of it and weight reduction, she smells like an old car now which is great imo , no more back firing all the time and she sound a lot better the brap is more there, only thing about doing these mods is the programming is still set to it which causes a jerking at low throttle
There's no conversion if something is designed and built metric to begin with. Just invest in the correct tools. I've been working on vehicles and bikes for over 20 years and have yet to use any of my imperial/standard/sae sockets. 99% is metric. @@TheMotoRider400ex
twowheeledsmurf why not have both? So many vehicles have 3/8th and 5/8th bolts. No metric size come close. Ever work on Detroit two tropes? Almost everything is 1/2 or 5/8. Good luck tearing that down with metric tools
I just got a 08 wr250r and I want to do this mod I am just wondering if this let's unfiltered air to go to the motor or is all the air still filtered first? thanks
This opens up the air box intake so more air can quickly get into air box the air then gos through the air filter into the engine intake, if you open up the side cover on the right side you will see a big black thing with a screwdriver phillips head if you unscrew that inside is the air box if you look toward the front of the bike inside the air box you will see the air filter on top of that box is where you are remove and taping down flapper still filtered air but it will need to be cleaned more as more air is getting in. ps i use 3m double sided tape now to tape down flapper, go online and look at some diagrams of your bike or even look at its Manuel to understated whats whats ^^ good luck with this and Fall Softly
Worth noting that without some sort of cap on those vaccum lines, it's is theoretically possible for dirty air to get pulled into the intake, after the filter. Probably unlikely, but possible
so, I'm taping it opened not closed correct? I'm trying to increase the airflow? my bike tends to bog for a split second when I jerk the throttle fast, then it's revs up where it should. it's almost like a split second hesitation. I'm hoping this mod will help that.
yes once you take off that metal thing on top the vacuum you will have a flap there that gos up and down tape it down so that you can put finger into air box so i guess you would say opening but really you are just leaving it so that it will not close air flow this is a step in the right direction but get a fuel injection kit to fix that jerkily nice i got the EJK easy to use well worth the money www.electronicjetkit.com/DirtBike/viewproduct.asp?partnumber=9310207
Pretty good vid. Seems like you're using SAE tools on a Metric bike. Mismatched tool sizes will work for light jobs like this, but wouldn't hurt to invest in a set of Metric sockets. Also, they sell vacuum hose caps on Amazon, Harbor Freight or any auto parts store near you. Easier and cleaner than duct tape on the end of the hose. Finally, some double sided tape or Velcro would look so much better than duct tape. You can hide it under the flapper for a cleaner look. No insults meant. Next time you have the seat off you could use these tips to clean it up.
nice i believe its the same for all WRR/X, this mod mainly just opens up the air box to allow the bike to breath freely. you don't need any equipment or anything to make it work right but a EJK will take the bike to the next level. stock this mod will reduce weight, make bike louder at cruise may make your bike pop more because of the AIS but that's fine. I believe it also helps to smooth out that jerky throttle too. If you are looking to maximize the engine potential this is a step in that direction. its also reversible it you do it my way. just use 3M double sided tape to hold flap down ^^ sorry it toke so long to respond if you got more Q's ask away
My question would be, "how many of these OTHER people in the forums that have done this mod are professional mechanics?" The reason I ask this is, what proof is there that this mod actually works? I guarantee you that if you put your WR on a Dyno, you would not even be able to tune it properly. The air intake system is designed from its stock form to mix fuel and air ratio at it's optimum efficiency. Doing this mod will not, despite what you think, increase the bikes performance at all, it will actually hinder the performance and increase the fuel consumption. If you don't believe me, take your bike to a professional shop and have them put it on a dyno. If you want more power out of a bike, buy a bigger bike.
everyone that has a WR250r dos some sort of flapper mod XD in fact some cut out the whole thing to make it real open, even when the bikes fist come out the magazines that test the bike take out this door, listen you can go out and read tons of info on this or you can look at my video that was taken after the mod to insure it work and was no problem i spent hours reading about this. i can tell you are not mechanically knowledgeable, like i was way back but trust me it works. Read the other comments on this video alot of people like you have commented around the same Q ?.? i exampled it to them. Yes you don't get the full effect without an FI commander i have one so yeah you are some what right on that point. BTW i have 12000 + miles on her now all of mine and she runs like a champ, Good luck mate fall softly ^^
MotoStrikerUnit I am not saying, don't do this mod, what I am saying, for those who think this mod will turn their bike into some beefed up race bike, don't hold your breath. Like you, I have read numerous articles and forums on this mod but the fact is, unless you install something like an FMF Power Programmer, this mod will not do anything for your bike. The Dyno doesn't lie. I will trust the word of a Dyno over that of a million backyard mechanics eight days a week. After watching your video, I started looking into bikes with this mod that have actually taken their bike and had it tested on a Dyno. This is the very first video I watched... Expert Dyno Tuner Says: "DON'T Modify Air Box on Motorcycle!!" | MotoVlog CycleCruza After putting over ten grand into my WR, the last thing I am going to do is to start hacking and drilling it up.
MrDirtdart............you are absolutely right!! I have a FMF Q4 Slip on with FMF Power Bomb and the FMF Power Controller....I did this mod and then took it in to have it tested on a Dyno. The results were totally amazing. With the "flapper mod" the readings on the Dyno were total shit. Despite sounding better and performing better, (or so I thought) the fact of the matter is, without this mod, a WR runs more efficient without this mod and that, I proved on a Dyno. I guess the guys at Yamaha kinda know what their doing, more so than all these, "backyard mechanics" as you say!
matt n jeff that's totally against any of the physical of air intake, and it not over flowing the box nor is it really changing the air flow just allowing it to flow freely, but yes it dos not make a REAL difference power wise
Can you tell me when the air flapper door get close? My air flapper door is always down, even when I rev up my WR250. I don't see how this air flapper mod would be that much help on increasing air flow.
***** I didn't know you can ride the bike with the seat off looking at the intake XP, no hard feelings, the door closes when you back off the throttle when moving at a good pace, this mod will leaves the door open it is most noticeable at low speeds or when going on and off of the throttle frequently. It stops it from closing not increasing airflow pre say but allowing it to be unchanging amount of air it can intake. hope this helped
MotoStrikerUnit I do know I can start up my bike on neutral while on kickstand with the seat off. The flapper never moved even when I rev to red line. I even disconnect the hose and repeat the same to check the vacuum strength -none. I bet you never look into the flapper operation itself but repeat what other people said on the internet. Show me a video where the flapper door open and close while the bike is being rev up and down.
***** "the door closes when you back off the throttle when moving at a good pace, this mod will leaves the door open it is most noticeable at low speeds or when going on and off of the throttle frequently." can you read cause i have reading problems and i can understand what this means. neutral dos not have full rev range power, "I bet you never look into the flapper operation itself but repeat what other people said on the internet" just these people are the people that are renowned for testing bikes, i have obviously read more about this then you come back when you study up on this, instead of doing flawed lab test with bad procedures.
Ya i was thinking this was an option, i may completely remove the flapper though, im not sure yet, gonna get me an real nice air filter first then see about this mod
gearjunky it will definitely help your bike scene you have an aftermarket exhaust ^>^, i did not went to remove it,so that if it did do, bad things i could just put it all together again with nothing broken, but you should look in to taking all the EPA stuff off the bike just hindering your bike don't need it any more anyway lol
+Kamotion Thanks ^.^, I know that's why i felt this way was for the best for me, no cutting or breaking off anything just unplugging things and still dos what I need to do.
Hey man, thanks for the vid. How is this mod holding up? I did a google search but didn't find any threads on removing just the solenoid. Where did you read about it? Thanks!
fender7802 Thanks for watching =^.^=, well ^.^> i read a lot of threads and broke down what was the problem that caused the flapper to close that problem was the solenoid so if you take that out problem solved just tape up the lose ends, if you do not have a stock exhaust then there is a lot more to do just look up a video on removing the EPA stuff or something along those lines. Its holding up real well i used duck tape to tape thing down only thing about doing this is you will have to clean air filter more often -.- .
no starts better now, and this mod is not increasing the amount of air in engine it is allowing more air to be available for the intake, the flapper cuts off air flow. you stop that from happening by making it not close
+M VICE Thanks for watching the video glade you like it, i know the tool kit i have has metric in it too, i am just lazy and grab the first one i see that fits XD, thanks for the advise i will definitely go get some hose caps. but i think i will leave the tape on the flapper, i did this mod this way so that if i ever wonted to put it back together i could, but as seeing l think this should have never been on the bike to begin with i will look for a better way to go about holding the door down. Thanks again =^.^= {Fall Softly}
Did you have a fuel programer when you did this l?
+1 for doing this mod wearing a full face helmet. kudos
Connor Grimes lol it was not to bad :) thanks for watching
If you remove the entire system, you only need a 3/16 vacuum cap right? Installed at the throttle body.
yes i believe i toke the rest of the junk out and there is only one tube left and the hole at bottom of air box also the block off plate is need for exhaust port
Tried this your way today. Hope it isn't necessary to remove all the other parts that people remove?
no it is not necessary this mod just holds door open for free air flow, i have removed all the other AIS for the bike it, just for the hell of it and weight reduction, she smells like an old car now which is great imo , no more back firing all the time and she sound a lot better the brap is more there, only thing about doing these mods is the programming is still set to it which causes a jerking at low throttle
th-cam.com/video/WFTOrxg_B6w/w-d-xo.html
I'm gonna try this! Great video MotoStriker.
+CheerX9087 Thanks, its pretty easy to do, but if you have any Q's don't be afraid to ask ^^
5/16s tf?
its a 10 or a 8 mm under seat sorry back in the day when i was new to all this ^^
I think 8mm
It coverts to 8mm you tards its standard
There's no conversion if something is designed and built metric to begin with. Just invest in the correct tools. I've been working on vehicles and bikes for over 20 years and have yet to use any of my imperial/standard/sae sockets. 99% is metric. @@TheMotoRider400ex
twowheeledsmurf why not have both? So many vehicles have 3/8th and 5/8th bolts. No metric size come close. Ever work on Detroit two tropes? Almost everything is 1/2 or 5/8. Good luck tearing that down with metric tools
I just got a 08 wr250r and I want to do this mod I am just wondering if this let's unfiltered air to go to the motor or is all the air still filtered first? thanks
This opens up the air box intake so more air can quickly get into air box the air then gos through the air filter into the engine intake, if you open up the side cover on the right side you will see a big black thing with a screwdriver phillips head if you unscrew that inside is the air box if you look toward the front of the bike inside the air box you will see the air filter on top of that box is where you are remove and taping down flapper still filtered air but it will need to be cleaned more as more air is getting in. ps i use 3m double sided tape now to tape down flapper, go online and look at some diagrams of your bike or even look at its Manuel to understated whats whats ^^ good luck with this and Fall Softly
Worth noting that without some sort of cap on those vaccum lines, it's is theoretically possible for dirty air to get pulled into the intake, after the filter. Probably unlikely, but possible
so, I'm taping it opened not closed correct? I'm trying to increase the airflow? my bike tends to bog for a split second when I jerk the throttle fast, then it's revs up where it should. it's almost like a split second hesitation. I'm hoping this mod will help that.
yes once you take off that metal thing on top the vacuum you will have a flap there that gos up and down tape it down so that you can put finger into air box so i guess you would say opening but really you are just leaving it so that it will not close air flow this is a step in the right direction but get a fuel injection kit to fix that jerkily nice i got the EJK easy to use well worth the money www.electronicjetkit.com/DirtBike/viewproduct.asp?partnumber=9310207
MotoStrikerUnit awesome, thanks for the reply. I'm going to try this, this evening.
nice, np its petty easy don't expect a world of diffaces though
@@MotoStrikerUnit7 "Don't expect a world of difference?" In the video, you raved about how much of a difference it made. I'm confused.
Pretty good vid. Seems like you're using SAE tools on a Metric bike. Mismatched tool sizes will work for light jobs like this, but wouldn't hurt to invest in a set of Metric sockets. Also, they sell vacuum hose caps on Amazon, Harbor Freight or any auto parts store near you. Easier and cleaner than duct tape on the end of the hose. Finally, some double sided tape or Velcro would look so much better than duct tape. You can hide it under the flapper for a cleaner look. No insults meant. Next time you have the seat off you could use these tips to clean it up.
@M VISE .. Shut the hell up, nobody asked for your crap advice
Hi ! great video! what your impressions a year after ?
any other power /air mods you have done to your bike?
going to make a video in the next two weeks about that and other updatey things stay tuned ^^
Great!
I have a 2011 wr250 with stock exhaust. If I do this, will I need a power programmer or anything? What results should I see?
nice i believe its the same for all WRR/X, this mod mainly just opens up the air box to allow the bike to breath freely. you don't need any equipment or anything to make it work right but a EJK will take the bike to the next level. stock this mod will reduce weight, make bike louder at cruise may make your bike pop more because of the AIS but that's fine. I believe it also helps to smooth out that jerky throttle too. If you are looking to maximize the engine potential this is a step in that direction. its also reversible it you do it my way. just use 3M double sided tape to hold flap down ^^ sorry it toke so long to respond if you got more Q's ask away
What exactly does this do to increase performance?
nothing it sets up bike to be modified, you went to see real results get a EJK , this just lets the intake be constant that's all
Great video. I'm going to give your approach a try. the best part of your approach is that you can return it back to factory settings; if desired.
+Zoltan Thanks, i know did not went to destroy the bike just improve on it ^.^ good luck and remember fall softly o#o
Update?
My question would be, "how many of these OTHER people in the forums that have done this mod are professional mechanics?" The reason I ask this is, what proof is there that this mod actually works? I guarantee you that if you put your WR on a Dyno, you would not even be able to tune it properly. The air intake system is designed from its stock form to mix fuel and air ratio at it's optimum efficiency. Doing this mod will not, despite what you think, increase the bikes performance at all, it will actually hinder the performance and increase the fuel consumption. If you don't believe me, take your bike to a professional shop and have them put it on a dyno. If you want more power out of a bike, buy a bigger bike.
everyone that has a WR250r dos some sort of flapper mod XD in fact some cut out the whole thing to make it real open, even when the bikes fist come out the magazines that test the bike take out this door, listen you can go out and read tons of info on this or you can look at my video that was taken after the mod to insure it work and was no problem i spent hours reading about this. i can tell you are not mechanically knowledgeable, like i was way back but trust me it works. Read the other comments on this video alot of people like you have commented around the same Q ?.? i exampled it to them. Yes you don't get the full effect without an FI commander i have one so yeah you are some what right on that point. BTW i have 12000 + miles on her now all of mine and she runs like a champ, Good luck mate fall softly ^^
MotoStrikerUnit I am not saying, don't do this mod, what I am saying, for those who think this mod will turn their bike into some beefed up race bike, don't hold your breath. Like you, I have read numerous articles and forums on this mod but the fact is, unless you install something like an FMF Power Programmer, this mod will not do anything for your bike. The Dyno doesn't lie. I will trust the word of a Dyno over that of a million backyard mechanics eight days a week.
After watching your video, I started looking into bikes with this mod that have actually taken their bike and had it tested on a Dyno. This is the very first video I watched...
Expert Dyno Tuner Says: "DON'T Modify Air Box on Motorcycle!!" | MotoVlog
CycleCruza
After putting over ten grand into my WR, the last thing I am going to do is to start hacking and drilling it up.
MrDirtdart............you are absolutely right!! I have a FMF Q4 Slip on with FMF Power Bomb and the FMF Power Controller....I did this mod and then took it in to have it tested on a Dyno. The results were totally amazing. With the "flapper mod" the readings on the Dyno were total shit. Despite sounding better and performing better, (or so I thought) the fact of the matter is, without this mod, a WR runs more efficient without this mod and that, I proved on a Dyno. I guess the guys at Yamaha kinda know what their doing, more so than all these, "backyard mechanics" as you say!
matt n jeff that's totally against any of the physical of air intake, and it not over flowing the box nor is it really changing the air flow just allowing it to flow freely, but yes it dos not make a REAL difference power wise
mrdirtdart i hear you man i came in a bit hot sorry
great vid. Nice simple approach. Removing all the parts seems overkill I'll do it your way.
andy3d1 Thanks stay tuned, got a lot of videos coming out soon =^.^=
Can you tell me when the air flapper door get close? My air flapper door is always down, even when I rev up my WR250. I don't see how this air flapper mod would be that much help on increasing air flow.
***** I didn't know you can ride the bike with the seat off looking at the intake XP, no hard feelings, the door closes when you back off the throttle when moving at a good pace, this mod will leaves the door open it is most noticeable at low speeds or when going on and off of the throttle frequently. It stops it from closing not increasing airflow pre say but allowing it to be unchanging amount of air it can intake. hope this helped
MotoStrikerUnit I do know I can start up my bike on neutral while on kickstand with the seat off. The flapper never moved even when I rev to red line. I even disconnect the hose and repeat the same to check the vacuum strength -none. I bet you never look into the flapper operation itself but repeat what other people said on the internet. Show me a video where the flapper door open and close while the bike is being rev up and down.
***** "the door closes when you back off the throttle when moving at a good pace, this mod will leaves the door open it is most noticeable at low speeds or when going on and off of the throttle frequently." can you read cause i have reading problems and i can understand what this means. neutral dos not have full rev range power, "I bet you never look into the flapper operation itself but repeat what other people said on the internet" just these people are the people that are renowned for testing bikes, i have obviously read more about this then you come back when you study up on this, instead of doing flawed lab test with bad procedures.
Ya i was thinking this was an option, i may completely remove the flapper though, im not sure yet, gonna get me an real nice air filter first then see about this mod
gearjunky it will definitely help your bike scene you have an aftermarket exhaust ^>^, i did not went to remove it,so that if it did do, bad things i could just put it all together again with nothing broken, but you should look in to taking all the EPA stuff off the bike just hindering your bike don't need it any more anyway lol
i know i know, just so damn much of it on there
too much if you ask me lol
nice video bro, gonna look into this myself. Just a little hesitant to cut into my new stock bike
+Kamotion Thanks ^.^, I know that's why i felt this way was for the best for me, no cutting or breaking off anything just unplugging things and still dos what I need to do.
Hey man, thanks for the vid. How is this mod holding up? I did a google search but didn't find any threads on removing just the solenoid. Where did you read about it? Thanks!
fender7802 Thanks for watching =^.^=, well ^.^> i read a lot of threads and broke down what was the problem that caused the flapper to close that problem was the solenoid so if you take that out problem solved just tape up the lose ends, if you do not have a stock exhaust then there is a lot more to do just look up a video on removing the EPA stuff or something along those lines. Its holding up real well i used duck tape to tape thing down only thing about doing this is you will have to clean air filter more often -.- .
MotoStrikerUnit Cool beans. So you don't find that the engine runs too lean or anything?
no starts better now, and this mod is not increasing the amount of air in engine it is allowing more air to be available for the intake, the flapper cuts off air flow. you stop that from happening by making it not close
MotoStrikerUnit I think you convinced me, thanks dude!
np, =^.^=
+M VICE Thanks for watching the video glade you like it, i know the tool kit i have has metric in it too, i am just lazy and grab the first one i see that fits XD, thanks for the advise i will definitely go get some hose caps. but i think i will leave the tape on the flapper, i did this mod this way so that if i ever wonted to put it back together i could, but as seeing l think this should have never been on the bike to begin with i will look for a better way to go about holding the door down.
Thanks again =^.^=
{Fall Softly}
8mm not 5/16. It's metric
Steven Smith lol Ik bro very old video I addressed this before look in comments thanks for watching
"DOUBLE THE POWER"?!?!?! XD
sorry was over over exaggerating, was new too this whole bike world , still have much to learn . sorry again for the misleading comments :(
thank u bro it help me a lot
+Andy Andy no problem man, glad to help ^^
5/16" wtf
already commented on this read comments
Jap bike bro... wrong tools.
already addressed read bro