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XS2 clutch pack question

Discussion in 'The Garage' started by iamunique127, Feb 22, 2019.

  1. iamunique127

    iamunique127 XS650 Member

    Hi all
    I’ve been a member here for some years but this may be the first thread I’ve started.

    The XS2 motor I’m working on has the original 6 clutch friction plates and they all measure the full thickness of new plates so I don’t see a need to replace them or update the clutch pack to a newer version.

    My question is about the rubber damper rings. I’ve seen it advised here to remove them. Can I just eliminate them from the clutch pack without any adverse effects?

    Thanks for any info on this.
     
  2. Mailman

    Mailman Hardly a Guru Top Contributor

    I have some clutch reference photos here,
    http://www.xs650.com/media/albums/1972-xs2-clutch-assembly.3073/


    Here is a discussion on early clutch’s vs later clutches and the improvements made to later clutch design
    http://www.xs650.com/threads/early-clutch-question.51629/

    Here’s my complete tear down and inspection
    http://www.xs650.com/threads/mailman’s-xs2-a-full-on-restoration.51520/page-53#post-557165

    And my installation of a later model clutch into my XS2, starting at post#1155
    http://www.xs650.com/threads/mailman’s-xs2-a-full-on-restoration.51520/page-58#post-560398

    As for just throwing the rubber spacers away, I don’t think you can get away with that, without making some other changes. Do your homework first, I’m trying to remember if there was a service bulletin from Yamaha regarding this. I know Mikes says you can discard the rings , you can read their material here,
    BD95CB4B-A994-48CE-B298-AFDF7A0CE9F6.png

    But I think there was some concern about winding up with the wrong clutch stack thickness. Sorry I can’t give you a definitive answer. But I suggest reading up on it.

    Bob
     
    TwoManyXS1Bs and GLJ like this.
  3. TwoManyXS1Bs

    TwoManyXS1Bs BBQ Hunter Top Contributor

    Sure. They were just a short-term (71-73) interim thing. They're slightly wider than the 3.5mm friction plates, and were meant to assist with clutch plate spreading during disengagement. After exposure to heat, oil, and time, they squash, take a set, and don't do diddly.

    For more on spreading clutch plates:

    http://www.xs650.com/threads/yamaha-xs650-experimental-clutch.47498/

    http://www.xs650.com/threads/yamaha-xs650-experimental-clutch-version-2-0.50189/
     
  4. iamunique127

    iamunique127 XS650 Member

    Thanks for the info, guys.
    For some strange reason I've been unable to log-on to the forum for a few days to post a reply.
    I had read some of the threads you linked to but some of them are new to me. They are very helpful.
    All my parts meet the specs for new parts so they must not have been used much. The bike was sitting for at least 25 yrs. I will try using them and see what happens. If they aren't suitable I have a later clutch I can buy the friction plates for.
    Much appreciated.
     
  5. XSLeo

    XSLeo XS650 Guru Top Contributor

    I think the early plates spec at 3.5 where the later ones 3.
    I have had several clutches apart and most are very close if not at spec. Usually they get replaced from operator error.
    Using wrong oil, poor adjustment, both can lead to slipping, causes over heating. Warped and burnt.
    Leo
     
    TwoManyXS1Bs, Mailman and GLJ like this.
  6. iamunique127

    iamunique127 XS650 Member

    Thanks for your insights Leo.
    I guess my parts may not work properly but I figure I might as well try what I have before buying new parts. This motor won’t be in a daily rider anyway so I can wait for new parts if I need them.
     

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