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Thread: Slipper Clutch One Way Valve

  1. #1
    amb67
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    Slipper Clutch One Way Valve

    Decided that my so called slipper clutch was virtually non functional the other day so I decided to take it off and test it.

    Sure enough I could blow through it both ways with ease.

    Knowing full well that it was scrap anyhow I decided to dismantle it to see what had gone wrong, this is what I found:



    Oh well, off to InMoto in Croydon tomorrow to see if they have any on the shelf.

    Worth testing as it only takes 30 seconds.

  2. #2
    One Liter Duc Eater
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    Well i seen this thread and thought if yours is knackered i should check mine..................
    and its knackered aswell

  3. #3
    IanG
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    As I gather it only works if you change down on a closed throttle,is it any great benefit??

    Although if it's there I guess it should be functional,but how many people actually downshift without matching the revs anyway ? it's not a true slipper clutch nor really a "back torque limiting device" like the one way cam setup on the Suzuki V twins.

  4. #4
    One Liter Duc Eater
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    Quote Originally Posted by IanG View Post
    As I gather it only works if you change down on a closed throttle,is it any great benefit??

    Although if it's there I guess it should be functional,but how many people actually downshift without matching the revs anyway ?
    I do cos im a fookin idiot.
    If its there it should be working.
    Where can i order one from please, sunny Berwicks in the middle of nowhere.
    Last edited by The Lone Ranger; May 17th, 2009 at 09:50 AM. Reason: fookin idiot

  5. #5
    spoonz
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    That valve in the pic is the old type. It has been superceeded by a new and much more reliable version.

    The old ones failed regularly.

    IanG it works on vacuum in the Tb's which will only be high on a closed or nearly closed throttle. If you like to rev match on downchanges it may prevent the slipper from doing much. Better something than nothing though.

  6. #6
    amb67
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    Quote Originally Posted by spoonz View Post
    That valve in the pic is the old type. It has been superceeded by a new and much more reliable version.

    The old ones failed regularly.

    IanG it works on vacuum in the Tb's which will only be high on a closed or nearly closed throttle. If you like to rev match on downchanges it may prevent the slipper from doing much. Better something than nothing though.
    Judging by how tight it was in those pipes, I agree it must be the original fitment.

    I had heard that it had been superseded by a much more robust unit and shall post a piccie of the new one before I fit it.

    I agree that it is hardly ever used but when pressing on a bit it does have its uses, trust me.

    PS. Mine was fitted with the arrow facing up towards the throttle bodies, is this correct as I cannot see any details in the workshop manual about this?

  7. #7
    AMA Pit Boss AREESSMILL's Avatar
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    Where is this one way valve located? and do I have to take the tank up?

  8. #8
    One Liter Duc Eater
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    Quote Originally Posted by amb67 View Post
    Judging by how tight it was in those pipes, I agree it must be the original fitment.

    I had heard that it had been superseded by a much more robust unit and shall post a piccie of the new one before I fit it.

    I agree that it is hardly ever used but when pressing on a bit it does have its uses, trust me.

    PS. Mine was fitted with the arrow facing up towards the throttle bodies, is this correct as I cannot see any details in the workshop manual about this?
    Mine is like yours in the picture and broken in the same way, it was also fitted with the arrow facing upwards and i had to use a flat head screwdriver to lever the beggar off.

    Please wheres a good place to order one and get sent to me reasonably quickly?

  9. #9
    amb67
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    Quote Originally Posted by The Lone Ranger View Post
    Mine is like yours in the picture and broken in the same way, it was also fitted with the arrow facing upwards and i had to use a flat head screwdriver to lever the beggar off.

    Please wheres a good place to order one and get sent to me reasonably quickly?
    Send me a PM and if my local Ape dealer has 2 tomorrow i'll get you one and post it to you.

  10. #10
    amb67
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    Quote Originally Posted by AREESSMILL View Post
    Where is this one way valve located? and do I have to take the tank up?
    Nah, you can get at it with the tank in situ.

    Crouch down by the bike on the throttle side and you can see it in between the tank and the frame.

  11. #11
    One Liter Duc Eater
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    Quote Originally Posted by amb67 View Post
    Send me a PM and if my local Ape dealer has 2 tomorrow i'll get you one and post it to you.
    Much appreciated, Thanks

  12. #12
    Baby Twin
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    One way - Non return valve

    Quote Originally Posted by amb67 View Post
    Send me a PM and if my local Ape dealer has 2 tomorrow i'll get you one and post it to you.
    Hello,

    This is for several years, but can you tell me the reference of the check valve you have used please?

    Is this an adaptable model?

    Thank you very much for your attention.

    Best regards,

    Jean-Pierre Cane

  13. #13
    Super Moderator Tash's Avatar
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    Quote Originally Posted by canonball38 View Post
    Hello,

    This is for several years, but can you tell me the reference of the check valve you have used please?

    Is this an adaptable model?

    Thank you very much for your attention.

    Best regards,

    Jean-Pierre Cane
    I have got a brand new one if you need one 30 including delivery.

    Cheers Mark

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