PAIR valve blockoff

Discussion in '6th Generation 2002-2013' started by Def-E-nition, Mar 22, 2007.

  1. Spike

    Spike New Member

    Joined:
    Aug 26, 2006
    Messages:
    1,579
    Likes Received:
    2
    Trophy Points:
    0
    Where is a link to the instructions for doing the PAIR valve block off? Know I have seen it, but can't seem to find it right now.

    David, how did that all end up working out? Just ordered the Motad pipe, already have the Staintunes. Going to have the Motad Jet-Hot coated first.
     
  2. Def-E-nition

    Def-E-nition New Member

    Country:
    South Africa
    Joined:
    Mar 1, 2007
    Messages:
    125
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Mossel Bay , SOuth Africa
    Map
    Laser Pipes - do you think they're available In The Land of the Dark Otto ?

    I'm now considering drilling through the Bend in the Pipe sommer straight from the Back , with a Longish drill bit . I dont want to go completely bos , and then the next guy doesnt want it . Man , as slow as this bIke Is against the Supies ( and it Is , my G%$D ..) , I still enjoy that low gurgle , and blipping the throttle on this thing is simply Luurrrrvly ..... !
     
  3. chomper

    chomper New Member

    Country:
    United States
    Joined:
    Feb 12, 2007
    Messages:
    949
    Likes Received:
    6
    Trophy Points:
    33
    Location:
    Greater Vancouver Area B.C
    Map
    reg with you on that one, what the hell was that moron doing!!
    drivers like that is what scares the hell out me :scared: :scared:
     
  4. Def-E-nition

    Def-E-nition New Member

    Country:
    South Africa
    Joined:
    Mar 1, 2007
    Messages:
    125
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Mossel Bay , SOuth Africa
    Map
    The smae thing Happened YESTERDAY on our blanket run to a neighbouring town .
    The guy pulled in front of a Kawa Zx 10 , and now the guy is sitting with $2000 damage .

    but that guy in the video does bother me - i cant figure out what in Hells name he was up to ? The rear brakes just locked , I wonder if he didnt maybe catch a fright coming up to the stopped traffic or something so quickly .
    also , looks like that tyre that locked , is also thinner than the others , meaning - he'd been driving with the Spare on , and hence it was the easiest to lock up . The fool .
    The rider was lucky that she got it all on video .
    The guy who fell yesterday tells me the driver of the car started getting all cocky when the cops showed up - i reckin he KNOWS the cop , and , so , who do you think is going to prosecute him now when his mate is the Cop ??

    Thats just wrong .

    Overall , what a ride , Damn but itwas nice following 200 bikes .
     
  5. Def-E-nition

    Def-E-nition New Member

    Country:
    South Africa
    Joined:
    Mar 1, 2007
    Messages:
    125
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Mossel Bay , SOuth Africa
    Map
    Check this out ..........
     
  6. aotto

    aotto New Member

    Joined:
    Mar 19, 2007
    Messages:
    47
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Johannesburg, South Africa
    Map
    Not sure but almost doubt it. I haven't seen them advertised anywhere. I just know they cost losts of RR's! Around R8 500 if I'm not mistaken. You can import them directly from the manufacturers. The process is relatively simple.

    I also tend to but one should not compare the VFR to the supers. Different in just about all aspects! Besides the comfort and touring benefits and not sitting on a piece of card board, Viffers are a lot more forgiving when it comes to handling. The bike is stable in tight corners with no tank slapping resembling riding a bucking horse. Small rider errors are tolerated which gives me a lot more confidence. Simply a purrrfect bike for me!
     
  7. Def-E-nition

    Def-E-nition New Member

    Country:
    South Africa
    Joined:
    Mar 1, 2007
    Messages:
    125
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Mossel Bay , SOuth Africa
    Map
    [​IMG]
    [​IMG]
    [​IMG]
    Sorry - that what i wanted to show you - but it didnt want to upload .
     
  8. michman82

    michman82 New Member

    Joined:
    Mar 17, 2007
    Messages:
    1
    Likes Received:
    0
    Trophy Points:
    0
    Holy Cow, blocking the pair valve really works!

    After perusing the many threads related to the V-Tec performance issues, I took the least cost options approach and went -1 on the front sprocket and added a K&N air filter. The resulting performance was less than scintillating. So, per the instructions of "HondaFonda" (see below) I blocked off the tube exiting from the air box and connecting to the pair valve. Voila . . . the bike was transformed! I literally coudn't stop riding it . . .very fast. In addition to smoothing out the throttle response dramatically, the activation of the V-Tec boost is no longer a jerky surprise, but rather an anticipated delight!

    Cheapest and best mod I have ever made to a bike.
    -------------------------------------------------------------
    Here is how to fix the running issues that VFR800 VTEC.

    1 raise fuel tank

    2 locate hose that runs from the air box to the PAIR valve

    3 Insert a blockage into this pipe. (A large ballbearing is good)

    4 Ride bike

    What is happening is that when the bike is running the pair is opening to blast fresh air into the exhaust system. This was done to clean up the bikes emmisions. This systems worked fine on all models. Even carb models have this system fitted. When the VFR went to the first fuel injected model the PAIR valve was still used again to clean up emmisions without any problems. Then the VTEC model came along and it all went wrong. The reason for this is that the VTEC model had an O2 sensor fitted in the exhaust. What happens is that the PAIR valve is working pretty much from idle speed blasting fresh air into the exhaust system. The fresh air entering the exhaust is picked up by the O2 sensor which then thinks the bike is running lean (around 19:1) so sends a signal to the ECU to richen up the fuel mixture. The ECU is now pouring as much fuel into the engine as it can because the O2 sensor thinks its still running lean. The real fuel/air ratio being poured into the bike is now around 11:1 making the bike hard to ride and resulting in the snatchy throttle responce we have all been talking about in this thread.
    Trust me. Block off the PAIR pipe from the airbox to the PAIR valve and go for a ride. You'll be amazed.
     
  9. sbk12rs

    sbk12rs New Member

    Joined:
    Feb 19, 2007
    Messages:
    22
    Likes Received:
    0
    Trophy Points:
    0
    I'm the type that typically never " Mods Up " bikes .

    Having harleys for so many years and dressing them up , I just want to ride them now .

    Put some miles on my 06 this weekend and found that the rough-ness was starting to be a pain in the ass .

    After reading for some months about all you doing this Pair valve thing , I decided to give it a go . One hundred yards from the house , this was LONG over do . WOW what a difference ! While I was at it I took out the snorkel . ( sound cool ) not sure if it does anything . but how that thing is directed down it couldn't hurt to get its air from a higher area .

    Thanks Gents !!!!
     
  10. chomper

    chomper New Member

    Country:
    United States
    Joined:
    Feb 12, 2007
    Messages:
    949
    Likes Received:
    6
    Trophy Points:
    33
    Location:
    Greater Vancouver Area B.C
    Map

    michman great to find others did the same mod a few months back i was all set to buy a powercomander but tried the pair block first and it is exactly as you discribed it smoothes the bike out the way it should of been from idle through vtec saved a few bucks no longer need a powercommander somtimes the cheap free mods are the best. you should find you will get slightly more miles out of a tank as well:biggrin: :biggrin: :biggrin:
     
  11. Def-E-nition

    Def-E-nition New Member

    Country:
    South Africa
    Joined:
    Mar 1, 2007
    Messages:
    125
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Mossel Bay , SOuth Africa
    Map
    My only Question , to Anyone Following this Thread , would be This : If us NORMAL blokes , who wash dogs , feed our kids , go to the movies , ride mountains etc could pick up on this system working Incorrectly i.e the 02 sensor reading incorrect amounts of air etc , as has been described here - Why then , why , could a Bunch of japanese Honda experts , sitting with BIg computers , not have seen that this system would not work correctly ?????? Hmm ??? Always amazes me , as my old man is an engineer . He generally Veto's any changes I try to make on enignes , stating they are in delicate balance , built to work the way they do by a buncha Engineers ,and he's quite right on that .
    But for some reason these guys got the Pair valve system all wrong , and anyone who READS a Pair valve thread , will automatically Look up from the screen after reading , say , the third post and scan the house for the Garage's remote .....!!! almost like a Light bulb going in , eh ???!! heh heh heh heh .
    Wonder how they missed it though , heh ??
     
  12. shayne

    shayne New Member

    Joined:
    Jun 10, 2007
    Messages:
    12
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Brisbane, Australia
    My theory on emissions systems is that the engineers build the best engine they can given parameters such as cost and size restraints. Then they look at what has to be done for emissions, and restricting an engine seems to be the best and easiest option for them. It also allows for the fact that they do not have to fit this stuff for every market, although that is changing slowly.

    At least we can fix this stuff and have a great donk afterwards, if they built wimpy motors with no emissions crap it would be a lot harder. :biggrin:
     
  13. Def-E-nition

    Def-E-nition New Member

    Country:
    South Africa
    Joined:
    Mar 1, 2007
    Messages:
    125
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Mossel Bay , SOuth Africa
    Map
    There's not much we really CAN do with this thumper , is there ?
    I wish the Motor made 115 Bhp , I'd be in Heaven .
    The damn bike is just so nice to ride , i suppose we will always want more Sting in the tail . eh ??

    I dont suppose fitting a nice filter will REALLY do much wonders for the performance .... Im not a big believer in the "MAGIC" Filter !!
     
  14. chomper

    chomper New Member

    Country:
    United States
    Joined:
    Feb 12, 2007
    Messages:
    949
    Likes Received:
    6
    Trophy Points:
    33
    Location:
    Greater Vancouver Area B.C
    Map
    I dont think honda engineers missed this problam, desighn the engine then make the compromises for emissions. most people wouldent really know the difference unless informed, thats what makes sites like this so great
     
  15. winaje

    winaje New Member

    Joined:
    Apr 28, 2006
    Messages:
    360
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Melbourne, Australia
    Regarding actually fixing the problem:
    Has anyone removed the pipe entirely, and capped the two connectors at either end? Basically put a cap over the metal bit that the pipe pushes on to?
     
  16. Def-E-nition

    Def-E-nition New Member

    Country:
    South Africa
    Joined:
    Mar 1, 2007
    Messages:
    125
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Mossel Bay , SOuth Africa
    Map
    Yes . It has been done . A better fit in the long run .
     
  17. MrJoelieC

    MrJoelieC New Member

    Joined:
    Aug 25, 2006
    Messages:
    276
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Milford NH
    Map
    I just performed the Pair mod for 69 cents from my local hardware stor...It was 69 cents because I bought 3 different sized rubber stopper plugs to put into the PAIR Vlave itself and still put the hose over it to look stock....

    Slapped it all bck together and OMG! You mean I can corner wioth confidence and not worry about sudden unpredicatabl;e throttle surges at low speeds? You mean my bike is now Cooler than Cool?

    This is a must mod for All VFR models with PAIR Valves! I was questioning the valididty of this mod for 2 months... No questions anymore! It works and makes my Bike the coolest of the cool bikes ever!
     
  18. Def-E-nition

    Def-E-nition New Member

    Country:
    South Africa
    Joined:
    Mar 1, 2007
    Messages:
    125
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Mossel Bay , SOuth Africa
    Map
    On The Flip side - I've Noticed an Improvement , but it certainly didnt take ALL of the surge away . Unless Im a complete Moron or something , mine surges sharply even after the Pair Mod- I used a ball race inside the pipe - but if i keep the bike in the mid range and then give her a shove- then she's ok .

    AM i the only one still experiencing the Minor remains of PAIR , or is this completely Natural For this to be happeing ?? I know that a simple Ball race cannot be the simple solution for it , But if you guys are raving so much about this simple Mod , then Im missing something , if my results are differing so much from everyone else . Unless of course , I've simply forgotten what it feels like to have PAIR do its thang ..... And I've checked , I definitely have done the mod to the correct pipe .
     
  19. chomper

    chomper New Member

    Country:
    United States
    Joined:
    Feb 12, 2007
    Messages:
    949
    Likes Received:
    6
    Trophy Points:
    33
    Location:
    Greater Vancouver Area B.C
    Map
    If you ride extremely hard throttle cranked you may not notice as much the benifits of a pair block. most guys seem to complain that its hard to keep the bike smooth around 5000rpm with a pair block that problem goes away. decided to do a reverse and un block pair its been over 1500km since i did the block wow i didnt get far turned around did a block again it dose make a big!! difference not only in lower rpms. forgot how harsh the vtec transition was with out block. the way i understand the reason for the improvment is pair valve dumps air into exhaust over top of o2 sensor therfore momentaraly giving a false reading and a slightly to rich mixture and causing some unpredictable throttle response especially around vtec engagement and around 5000rpm or imo evey time the valve opens this is not the only bike that has this problam. as for asking you tec or mechanic about a pair block your only going to get a negitive answer after all he whants to sell you a power commander set it all up and then eliminate the o2 sensors there no money in shoving a cap screw or ballbearing in a rubber tube. emmision problams are nothing new people have been blocking them since the 70 to get there cages to run better. there is just no way i can go back to way the bike was it now runs the way it was desighned to nice and smooth
     
  20. Def-E-nition

    Def-E-nition New Member

    Country:
    South Africa
    Joined:
    Mar 1, 2007
    Messages:
    125
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Mossel Bay , SOuth Africa
    Map
    Yes , I seem to feel the difference when Im not riding the daylights out of her , which is rare .
    I am Not interested in top speed . I just really Enjoy the experience of going from 10 km/h to 176 km/h without even the slightest fuss ... these bikes are so rideable it's not funny . !

    Im trying to focus now on front and rear suspension . too scared to tamper with anything though . Perhaps I should turn the screws to one end , check , then completely the other way , check , and compare . That way you lwearn what turing the screws DOES , and what you'd need to get the bike to corner Better .
     
Related Topics

Share This Page