Tech talk: AIS / PAIR valve , the most misunderstood system on motorcycles today

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  • เผยแพร่เมื่อ 24 ธ.ค. 2024

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  • @romand123
    @romand123 3 หลายเดือนก่อน +4

    Thanks for the explanation. My KLX 300r’s header pipe was glowing red at low idle scenarios/trail riding so I disabled the pair valve. The result was that the header pipe doesn’t turn cherry red anymore…saved me $450 as I was going to purchase an ECU.

    • @josephmears3537
      @josephmears3537 หลายเดือนก่อน +1

      Im picking up one of these tomorrow. It has a pro circuit slip on so im curious if this mod was done to it already. Guess ill find out tomorrow

    • @romand123
      @romand123 หลายเดือนก่อน

      @@josephmears3537 nice, you're gonna love it!

  • @pulgas_ph
    @pulgas_ph หลายเดือนก่อน +1

    This is a great post. All this time I was misled to believe that my bike pops because it is lean which is not always the case.

  • @QuickShiftMoto1
    @QuickShiftMoto1 ปีที่แล้ว +4

    Great post David! So much misunderstanding about this system. The system is actually advantageous on a stock bike without decat.

  • @corner_store_bill
    @corner_store_bill หลายเดือนก่อน +1

    Thank you. I learned something today. I'll keep it on the bike.

  • @michaelhefford6420
    @michaelhefford6420 5 หลายเดือนก่อน +2

    100% improves start off from stop on a DR650 and low speed riding surges. Also eliminates popping…my bike is stock otherwise. No aftermarket exhaust.

  • @JasonVandermeulen-z9e
    @JasonVandermeulen-z9e 6 หลายเดือนก่อน +2

    Great video! Planning to do block off plates on my 2013 Honda Cb1100 after I installed a catless exhaust setup.

    • @leea.3772
      @leea.3772 5 หลายเดือนก่อน

      Please report back after you do. I have the same bike with full delkevic exhaust:

  • @mr__pool_4256
    @mr__pool_4256 4 หลายเดือนก่อน +2

    This has been very informative thank you. I am very sorry for the environment but I can’t deal with the popping (and people talking about the popping) and flames with my Cobra Shotguns I am stuck with thanks to the previous owner.

  • @MultiDreamer1979
    @MultiDreamer1979 5 หลายเดือนก่อน +2

    Great stuff man I just did mine on my 2024 MT-10 SP and put a woolich tune on it as well it still needs some tweaking but boy what a difference 🎉

    • @vcyclenut
      @vcyclenut  5 หลายเดือนก่อน +1

      woolich doesnt make tunes, woolich makes software and hardware to allow someone to tune.

  • @georgemcpherson3706
    @georgemcpherson3706 10 หลายเดือนก่อน +7

    On a tuned bike with a full (catless) exhaust if you don't want the flames/decel pop block off the airflow, plates are pretty expensive for what they are flare plug and cap work just fine, good information in the video though.

    • @drunkpolack7612
      @drunkpolack7612 9 หลายเดือนก่อน +2

      Bought some off aliexpress for 12 bucks, definitely worth it

    • @dillonskinner5496
      @dillonskinner5496 7 หลายเดือนก่อน +1

      I just capped my line

    • @Dat_Zupra_Dude
      @Dat_Zupra_Dude 7 หลายเดือนก่อน

      If someone WANTS the flames and pops on decel and keeps the factory PAIR/AIS Valve system BUT removes the charcoal canister and caps the purge valve hose, then is it possible to still have flames and pops on decel ??

    • @brandongreene9615
      @brandongreene9615 5 หลายเดือนก่อน

      Doesn’t this feature make the bike slow down a lot when you let off the fuel?

    • @nimaO_G
      @nimaO_G 3 หลายเดือนก่อน

      Would blocking off the tube that goes into my Airbox be enough? I have a k9 gsxr600 and I have an ecu flash tune because of my cat less midpipe install.

  • @DonTharp
    @DonTharp 3 หลายเดือนก่อน +1

    Thank you, appreciate it.

  • @Phantom_Gixxer
    @Phantom_Gixxer 4 หลายเดือนก่อน +2

    you just saved me so much time and money

    • @giddyup3443
      @giddyup3443 4 หลายเดือนก่อน

      I wish I would have seen this before I ordered mine from a different company, had the bike tore apart way to far, wasted a ton of time because I couldn't get the throttle body off, gave up on the block offs since there isn't a gain after I saw this video,..

  • @kidlo2050
    @kidlo2050 4 หลายเดือนก่อน +4

    Instructions unclear
    My bike hugged the tree with me

    • @vcyclenut
      @vcyclenut  3 หลายเดือนก่อน

      This was not an instructional video

  • @sergemcgraw6152
    @sergemcgraw6152 8 หลายเดือนก่อน +2

    Does blocking the PAIR valves on a non tuned bike (CB650R) with a aftermarket exhaust (no cat) affect the AFR ration in the combustion chamber? Because the O2 sensor in the exhaust will see richer mixture (because the PAIR are blocked, so no fuel is burned in the exhaust) so will assume the bike is richer than before and then leans it?

    • @vcyclenut
      @vcyclenut  8 หลายเดือนก่อน +3

      no, PAIR valves are only active at closed throttle and the stock o2 sensors are not that accurate that a small amount of air is going to change what it is doing.
      Also the stock o2 sensor is only active at light throttle and lower rpm's
      th-cam.com/video/HLrtlLSEdRo/w-d-xo.html

    • @sergemcgraw6152
      @sergemcgraw6152 8 หลายเดือนก่อน +1

      ​@@vcyclenut thanks mate. Doing this mod this week.

  • @germanfrankovsky2213
    @germanfrankovsky2213 10 หลายเดือนก่อน +2

    Great vidoe man!
    I was wondering if blocking the ais on a untuned bike can lean out the AF reading?
    After all, the air is injected in front of the o2 sensor, so theoretically it should read a richer mixture and withdraw fuel

    • @vcyclenut
      @vcyclenut  10 หลายเดือนก่อน

      Thanks !!
      The o2 sensor is only doing anything at light throttle and lower rpm.
      Also the ais valve is only open on closed throttle deceleration. The air fuel during decel is pretty irrelevant
      Here is a video i made about the o2 sensor
      th-cam.com/users/livesAVJ4bgi8cs?si=kO5fUAl7T2Q43cSt

  • @jamespreacherbeck4306
    @jamespreacherbeck4306 10 หลายเดือนก่อน +2

    Still very novice in understanding of system. After getting your ECU flash and having Graves slip-on, leave alone this alone? Or will adding block off plates help more. Apologies for my ignorance.

    • @vcyclenut
      @vcyclenut  10 หลายเดือนก่อน +2

      No worries. Leave it alone. The bottom line is blocking off the ais never adds performance it just stops popping

  • @SahibNoor123
    @SahibNoor123 3 หลายเดือนก่อน

    Does bike show engine error after removing it?

    • @vcyclenut
      @vcyclenut  3 หลายเดือนก่อน

      Depends on the bike

    • @SahibNoor123
      @SahibNoor123 3 หลายเดือนก่อน

      @@vcyclenut z900

    • @vcyclenut
      @vcyclenut  3 หลายเดือนก่อน

      @@SahibNoor123 I’m not sure I don’t have enough experience with that platform to say

  • @juanmaza8575
    @juanmaza8575 2 หลายเดือนก่อน

    great video! so the block off plates on EFI bikes block air from coming in from the AIS and does not cause any sealing issues in the future?

    • @vcyclenut
      @vcyclenut  2 หลายเดือนก่อน

      Thanks
      Sealing issues for what?

  • @zombie1078
    @zombie1078 6 หลายเดือนก่อน +1

    This is a very interesting video, thanks. I've been thinking about doing this with my bike, because it has an aftermarket muffler on it and I'm not really a fan of the popping and crackling. I guess that it would be expected that the tip of the exhaust would get a bit of soot around it after blocking the pair system?

    • @vcyclenut
      @vcyclenut  6 หลายเดือนก่อน

      Glad it was helpful! Yes getting some soot on the tip of the exhaust is always normal.

  • @MRR7
    @MRR7 หลายเดือนก่อน

    Thanks for the clarificaton!
    What if my bike pops right when I pull the clutch to shift upwards? But only when I do it in a sporty manner.

    • @vcyclenut
      @vcyclenut  29 วันที่ผ่านมา

      no worries on that

    • @MRR7
      @MRR7 29 วันที่ผ่านมา

      @vcyclenut thanks!

  • @JordanSmith-bt2sq
    @JordanSmith-bt2sq 2 หลายเดือนก่อน +1

    Great video, I already installed a full exhaust and got ecu flashed, can I install block off plates without needing another flash?

    • @vcyclenut
      @vcyclenut  2 หลายเดือนก่อน

      only thing that may happen is a check engine light for unplugging the ais solenoid
      what bike and who flashed it?

    • @JordanSmith-bt2sq
      @JordanSmith-bt2sq 2 หลายเดือนก่อน

      @@vcyclenutFlashed by Moore mafia they disabled pair valve so I don’t think i would get a light for removing it. I still would need to use block off plates to stop decel pop right?

    • @JordanSmith-bt2sq
      @JordanSmith-bt2sq 2 หลายเดือนก่อน

      @@vcyclenut 2024 Ninja 650

    • @vcyclenut
      @vcyclenut  2 หลายเดือนก่อน

      @@JordanSmith-bt2sq yep. Or just plug off the pair valve line as it comes off the air box

    • @JordanSmith-bt2sq
      @JordanSmith-bt2sq 2 หลายเดือนก่อน +1

      ⁠​⁠@@vcyclenutCool man thanks for the guidance, much appreciated

  • @FaithisKey792
    @FaithisKey792 8 หลายเดือนก่อน +1

    Amazing thank you.

  • @BrewProof
    @BrewProof 5 หลายเดือนก่อน +2

    my method to block off: remove valve and short tubes from between plates, remove longer hose to airbox, cut hose from airbox to fit between plates, connect both plates to each other without valve using the cut piece.. fill the hole in the airbox with a dab of silicone

    • @zackaryschrimsher7319
      @zackaryschrimsher7319 4 หลายเดือนก่อน

      How well does this work ? Thinking of doing it atm

    • @GeneralBW
      @GeneralBW 4 หลายเดือนก่อน +1

      It works just as good as block off plates.

  • @themightyquinn100
    @themightyquinn100 6 หลายเดือนก่อน +1

    This is really interesting! I have a carburetored 2012 Ninja 250. It has this system on it. But it also has a coaster enriching valve (air cutoff valve) attached to the carburetor which will reduce the amount of air flowing through the idle circuit on deceleration if the wheels are spinning the engine and the butterfly valves are closed. The purpose of this is avoid the lean condition at idle throttle with the engine still at high RPMs thereby reducing the popping and backfiring. It seems like this AIS and the coasting enriching valve conflict with each other. What are your thoughts on it?

    • @vcyclenut
      @vcyclenut  6 หลายเดือนก่อน

      No. They are both trying to reduce the amount of unburnt fuel coming out the exhaust

  • @InfintrusHD
    @InfintrusHD 6 หลายเดือนก่อน

    I appreciate this video a lot, it really cleared up a lot of questions I had about this! I notice you did mention that installing the block off plates would eliminate the popping/ backfire. If you have block off plates installed, is it still possible to have popping on decel? I would like to have some popping, but nothing crazy as I'm getting a full exhaust for my '19 R6.

    • @vcyclenut
      @vcyclenut  6 หลายเดือนก่อน

      Glad you liked it
      No. If you like popping on decel do not install block off plates.

  • @Jurshhh
    @Jurshhh หลายเดือนก่อน

    After installing a exhaust and leaving the AIS open does it have any negative impacts on MPG??

    • @vcyclenut
      @vcyclenut  หลายเดือนก่อน +1

      No

  • @romanhrytskiv8845
    @romanhrytskiv8845 ปีที่แล้ว +2

    Why gen3 mt09 doesn’t have this system in place?

    • @vcyclenut
      @vcyclenut  ปีที่แล้ว +2

      You would have to ask Yamaha that question

  • @cyberkiller83
    @cyberkiller83 2 หลายเดือนก่อน

    i dont understand why for flashing is required to eliminate que AIS system in order to get accurate readings... so how the stock ECU does it with the system in place on the first place?

    • @vcyclenut
      @vcyclenut  2 หลายเดือนก่อน

      Stock o2 sensor is a narrow band only for emissions. Doesn’t care if it’s a couple percent off
      Also the system when working properly is only active at closed throttle. Air fuel at closed throttle is not very important
      When tuning I want to be 100% accurate and can’t take the chance the system is leaking and bleeding in air during open throttle

  • @Jettset80
    @Jettset80 8 หลายเดือนก่อน +2

    So you said if your tuning a bike you prefer the block off plates so you get an accurate AFR readings. But if they are only working on decel or closed throttle what does it matter? If they aren't doing anything while cruising or acceleration how would it affect afr I don't understand. Im not trying to be an ass, as an amateur tuner im trying to understand

    • @vcyclenut
      @vcyclenut  8 หลายเดือนก่อน +1

      because they can leak. The valve should only be pulling air at closed throttle, correct, but I am not trusting my work to a rubber stopper against a hole.

    • @Jettset80
      @Jettset80 7 หลายเดือนก่อน +1

      @vcyclenut That's true I didn't think about that , makes sense

  • @2wheelsmorereels
    @2wheelsmorereels 9 หลายเดือนก่อน

    hi, thanks for the video! I’m just curious what happens if we get the selenoid out and plug the hoses directly ?

    • @vcyclenut
      @vcyclenut  9 หลายเดือนก่อน

      Most bikes will throw a check engine light if you unplug the solenoid without disabling the code in the ecu
      Plugging the line is a free way to block off the ais.

    • @2wheelsmorereels
      @2wheelsmorereels 9 หลายเดือนก่อน

      @@vcyclenut i couldn’t explain myself correctly 😅 i want to link hoses together so it can drag air all the time. what are the consequences?

    • @vcyclenut
      @vcyclenut  9 หลายเดือนก่อน

      @@2wheelsmorereels just lots of popping and🔥

    • @2wheelsmorereels
      @2wheelsmorereels 9 หลายเดือนก่อน

      @@vcyclenut i like that 😆 thanks!

  • @X4Piper
    @X4Piper 5 หลายเดือนก่อน

    Where is this located?? Someone said do marble mod on my GSXR but nothing points to where it is just plug 1 of the 3 hoses.

    • @vcyclenut
      @vcyclenut  5 หลายเดือนก่อน

      It’s on top of the valve cover on the Gsxr. You want to block the line that goes up to the airbox

  • @C.I.A_Unclassified
    @C.I.A_Unclassified 3 หลายเดือนก่อน

    Do you need a dongle to put into the stock connector so that it doesn’t throw any engine codes?

    • @vcyclenut
      @vcyclenut  3 หลายเดือนก่อน

      Depends on the bike

  • @Matthew-z4u
    @Matthew-z4u 8 หลายเดือนก่อน

    Hey I recently flashed my ecu on my Zx4rr. I have only a slip on and I did disconnect my o2 sensor but do I need to do anything to the AIS/pair valve for just a slip on? Thanks!

    • @vcyclenut
      @vcyclenut  8 หลายเดือนก่อน

      did I do the flash? If so I sent the ecu back with an information sheet.

  • @thehoodieguy3491
    @thehoodieguy3491 6 หลายเดือนก่อน +1

    Nice explanation! When the ECU flash disables the AIS, would it achieve the same as installing the PAIR valve block-off plates (provided that the rubber seals are functioning) and no pops on deceleration? Also, will the AFR be affected when the seals fail because it constantly draws fresh air from the airbox to the exhaust?

    • @vcyclenut
      @vcyclenut  6 หลายเดือนก่อน +1

      In theory yes. But it’s pretty rare they seal up completely
      It won’t affect the actual air fuel ratio. Just what a wide band o2 sensor would read because the fresh air would dilute the exhaust gasses

  • @revvedout857
    @revvedout857 ปีที่แล้ว

    Can you tune with a rapid bike race on the bike? Will an AIS delete help the rapid bike module adjust better?

    • @vcyclenut
      @vcyclenut  ปีที่แล้ว

      Ive run into issues before with the rapid bike. Yes you should block off your ais to give the rapid bike the most accurate exhaust readings. Im surprised it didnt say that in the instructions for it.

    • @revvedout857
      @revvedout857 ปีที่แล้ว

      @@vcyclenut i didnt install it so i dont know. im going to email you with some questions.

  • @DaBuGzLiFe
    @DaBuGzLiFe 5 หลายเดือนก่อน

    Tareq brought me here, Im looking to get flames shooting out of my ZX4RR as well. Would buying your tune do it? Or do I need this as well?

    • @vcyclenut
      @vcyclenut  5 หลายเดือนก่อน +1

      You DONT want these if you want flames
      Are you running a full exhaust?
      If so we can get it to shoot flames
      You will need my flash
      www.vcyclenut.com/store/p241/Kawasaki_ZX4RR_%2F_ZX4R__ECU_FLASH.html
      Then you will unplug the pair valve and it will pop and shoot flames on decel

    • @DaBuGzLiFe
      @DaBuGzLiFe 5 หลายเดือนก่อน +1

      @vcyclenut when I have time, I will get the ECU and mail it to you for some sweet, sweet flames 😍 I'm going to get a full exhaust soon so I'm guessing I'll wait till it comes in.

    • @vcyclenut
      @vcyclenut  5 หลายเดือนก่อน +1

      Yes. It won’t shoot flames without a full exhaust. I sell most of the systems out and have great prices.
      Let me know what one your looking at

  • @YoungBossSteppa
    @YoungBossSteppa หลายเดือนก่อน +1

    So it can still pop even with the blocks offs and the tune.

    • @vcyclenut
      @vcyclenut  หลายเดือนก่อน

      Some small popping /gurgling on decel with aftermarket exhausts is inevitable ,but you should never get machine gun pops or loud booms and flames on decel with block of plates.
      If you do they are leaking.

  • @kalatonggek
    @kalatonggek 3 หลายเดือนก่อน

    i remove the breadbox of my z900 and installed an aftermarket pipe. however, i leave the catalytic converter intact. now my bike is popping on the deceleration. my question is will it hurt my bike if i dont retune. Thank you.

    • @vcyclenut
      @vcyclenut  3 หลายเดือนก่อน

      I haven’t tested the z900 like that so I can’t answer your question

  • @DonTharp
    @DonTharp 3 หลายเดือนก่อน

    Thanks.
    I would think the valve would cause more carbon build-up, if so that alone is reason enough to be rid of it.
    What's your thoughts?

    • @vcyclenut
      @vcyclenut  3 หลายเดือนก่อน

      carbon build up where?

  • @joeyduberules
    @joeyduberules 2 หลายเดือนก่อน

    should i block off these things on my cbr1000rr before a performance tune?

    • @vcyclenut
      @vcyclenut  2 หลายเดือนก่อน

      I would yes

  • @D.P.9
    @D.P.9 4 หลายเดือนก่อน

    is it bad that I have a factory exhaust and have disabled this system?

    • @vcyclenut
      @vcyclenut  4 หลายเดือนก่อน

      No. Just didn’t accomplish anything really. Unless you’re analyzing the exhaust gas for air fuel ratio.

    • @D.P.9
      @D.P.9 4 หลายเดือนก่อน

      @@vcyclenut Thank you very much for the reply, I just wanted to know if I am doing any damage to the fuel ratio and the engine in general

  • @grantking7833
    @grantking7833 ปีที่แล้ว

    Could a person pick up two rubber plugs and cap off both inlets of the pair valves?

    • @vcyclenut
      @vcyclenut  ปีที่แล้ว

      you could, yes
      some bikes without the ecu flash to shut off the check engine light unplugging the solenoid will create CEL. So you may have to leave the solenoid plugged in anyway

  • @dav8388
    @dav8388 5 หลายเดือนก่อน +1

    you mentoned an aftermatrket exhaust without a cat, but what about one with a cat. I just put a Kelpi exhaust on my 24 XSR900, and I noticed the poping on decel. I knew it was this system doing what it was designed to do, but would it damage the aftermarket cat by disableing this system? i realy don't care for the pops, and would rather it not do it.

    • @vcyclenut
      @vcyclenut  5 หลายเดือนก่อน

      The 24 xsr does not have an ais system to block off or disable

    • @dav8388
      @dav8388 5 หลายเดือนก่อน

      @@vcyclenut oh ok. Learned something new. I honestly never looked into it just assumed it did lol. When I put the bike away for the winter I'll send ya my ECU to do your magic.

  • @whatspeedlimits
    @whatspeedlimits 10 หลายเดือนก่อน

    Where are you located? I am also a bike nut...and also own my own motorcycle dyno. Would be cool to hang out with fellow minded people.

    • @vcyclenut
      @vcyclenut  10 หลายเดือนก่อน

      very north west corner of Washington state, you?

  • @hossor123
    @hossor123 7 หลายเดือนก่อน

    Can i install this on my mt09 2021.. i want more pops and bangs!!

    • @vcyclenut
      @vcyclenut  7 หลายเดือนก่อน

      No. You bought the wrong bike for decel pops and bangs

    • @hossor123
      @hossor123 7 หลายเดือนก่อน

      @@vcyclenut Crap! Drill a small hole pipe before the muffler? or get a MT10 2022?

    • @hossor123
      @hossor123 7 หลายเดือนก่อน

      so a specific pops and bangs tune wont do much on a mt09 gen3??

    • @vcyclenut
      @vcyclenut  7 หลายเดือนก่อน +1

      @@hossor123 i vote mt10

    • @vcyclenut
      @vcyclenut  7 หลายเดือนก่อน +1

      @@hossor123 not without doing stuff i would not do to my own bike

  • @CaptainPetrolburner
    @CaptainPetrolburner 3 หลายเดือนก่อน

    OK David, big fire balls might help keep me from getting passed into turn 4 at PIR. 😂

    • @vcyclenut
      @vcyclenut  3 หลายเดือนก่อน

      LMAO!! the smoke screen I did would be more effective

  • @DonTharp
    @DonTharp 3 หลายเดือนก่อน

    Carbon in head?

    • @vcyclenut
      @vcyclenut  3 หลายเดือนก่อน

      No. It doesn’t do anything in the combustion chamber. Carbon build up is from having left over fuel. This eliminates that by burning it off. If anything it would reduce carbon build up in the exhaust port

  • @stephenbone9929
    @stephenbone9929 23 วันที่ผ่านมา

    Dumb question, as a simple fix why not just keep everything in place but, plug the air inlet hose that goes to the Air Box,,,, thus "blocking off" Air from entering into your exhaust system?

    • @vcyclenut
      @vcyclenut  23 วันที่ผ่านมา

      Not a dumb question. That works great and is free.

  • @alexpearson7693
    @alexpearson7693 7 หลายเดือนก่อน

    Why not just cap the stock plates?

    • @vcyclenut
      @vcyclenut  7 หลายเดือนก่อน

      Sure you can do that. easier to just cap the line off the air box but either way works

  • @raulx.garcia9387
    @raulx.garcia9387 4 หลายเดือนก่อน +1

    You can use a marble to take care of this in less than 5 minutes.

    • @vcyclenut
      @vcyclenut  4 หลายเดือนก่อน

      Yep. Most bikes it takes more than 5 minutes to get to the ais system but yes you can block off the ais line if that’s what you want

  • @7fold4ever
    @7fold4ever 5 หลายเดือนก่อน +1

    Most bikes come lean from the factory

    • @vcyclenut
      @vcyclenut  5 หลายเดือนก่อน +1

      Most factory fueling is lean at part throttle but rich at full throttle.
      What does that have to do with the ais system?

  • @marcialquinones5683
    @marcialquinones5683 ปีที่แล้ว

    I HAVE CBR1000RR2007 WHIT YOSHIMURA MUFFLER AND POWER COMMANDER I dont not exacly is good you recomended is better doe

  • @albrechthilker9072
    @albrechthilker9072 10 หลายเดือนก่อน

    You do not show a diagram where the valve is mounted in the motorbike. Just bla bla bla.

    • @vcyclenut
      @vcyclenut  10 หลายเดือนก่อน +4

      Sorry you thought my video sucked.

    • @mharjustinoespina890
      @mharjustinoespina890 8 หลายเดือนก่อน

      You have to have a bike with AIS so you'll know.

    • @BrandonMiracle-d1b
      @BrandonMiracle-d1b 7 หลายเดือนก่อน +1

      What a useless comment. If you're watching this you should already know/have no difficulty finding all other relevant information on the subject, eyesight and basic mechanical inclanation go far.

    • @MRR7
      @MRR7 หลายเดือนก่อน

      It's really useful information he is sayin , you're bla bla