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Reline Clutch Plates

Discussion in 'Technical and Troubleshooting Torque' at netrider.net.au started by Devery, Jun 25, 2011.

  1. Does anyone know anyone who will reline my worn clutch plates? Its for a 1973 CZ and I've been told I should just get the plates relined with modern materials but these people are all in europe so I'm still looking for someone who will help me out. I'm in Melbourne.

    :) Thanks,
    James.


     
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  2. There is a place that used to advertise in the bike mags that relined your plates with Kevlar or Carbon fibre.The Queensland Laverda specialist Redex Engineering sends all his old plates there and I have a set,they work really well,you just need to clean any oil screens in your system well for the first couple of 1000ks as some material comes off.Cannot help with a number but recommend them
     
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  3. Once upon a time it was commonplace to reline ones own clutch plates by cutting up old corks with a razor blade and inserting the slices into the friction plates before facing them flat again with sandpaper. A bit before my time but my dad and grandfather used to do it in the austere financial atmosphere of post-war Britain. I can't remember what a CZ friction plate looks like, as it's more than 20 years since I saw one, but I wouldn't be surprised if the level of technology is similar.

    BTW, I accept no responsibility if you actually try this and end up with a primary case full of an oil/burnt cork paste :D.
     
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  4. 8-[ haha yeah they are just cork inserts... but I'm not going to try that. Pretty keen on getting a professional to reline them with some modern material, so if anyone knows of a place in Melbourne... hook us up!
     
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  5. The place I wrote about is called Mr Clutch,there have a website.
     
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  6. Aaah memories of my old sprung hub trumpy (which btw was older than I am).

    I think the best thing about the good old days is that they are gone.
     
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  7. That's a bit harsh? I have similar memories of a Bantam ;)

    Without living through the 'good old days', I wouldn't have the experience to be able to do what I do to my bikes today. Don't be too quick to dismiss them :)
     
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  8. thanks for that zim. i looked them up but its something like $45 per plate. I think im looking for just standard relining, nothing for performance engines.

    in many respects the best thing about the good ol days is they are over. I agree. sometimes. :)
     
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  9. Sounds like it might be time to start drinking heavily and geting used to cut fingers :D.
     
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  10. True. But definitely more fun to ride a bike which is reliable instead of being locked into an endless cycle of repairs.
     
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  11. Reline it Pat's way. Just don't use plastic corks!!!
     
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  12. You forgot to add "heartless"... More fun to ride a heartless bike... I'm only joking. Each to their own. I personally enjoy riding and also working on the bike and I think I'm developing a better knowledge base rather than someone who simply rides a reliable bike. Perhaps that knowledge isn't important to some, but I find it necessary.

    PatB hasn't let me down yet! But I don't think I'm going to reline them myself... but out of curiosity, what would I line them with? If not cork.
     
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  13. For something like the CZ, cork should be fine. It's got about 13 bhp and it's not like you're going to be drag racing it :D.

    Alternatively, if you must try something else, you could always get hold of a cheapo car clutch plate, drill out the rivets holding the friction lining material in place and cut your segments out of that. However, I can see a couple of pitfalls.

    First off, be careful. In theory a modern clutch plate shouldn't contain asbestos. However, I wouldn't rely on this with Ebay cheapies or secondhand or new-old-stock stuff of doubtful vintage so work it wet and don't breathe any dust.

    Secondly, modern friction materials for non-bike applications are generally designed to work dry, not in an oil-bath situation, so it might not work.

    An alternative to sliced up wine bottle corks would be cork placemats or floor tiles. I'm not sure if they'd work but they'd provide a readily worked sheet material to try. If it doesn't work, it's not like stripping a CZ clutch takes more than a few minutes IIRC.
     
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  14. Pat, I was quite happy with replacing the clutch plates with cork ones, but people insist I upgrade so I thought I would at least try. I managed to find a guy in NZ who is sending over new clutch plates which are lined with something more modern. Problem solved. Only $140 for 5 plates, new springs and a clutch rod.

    Thanks for everyones help.

    James.
     
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  15. Fixed:bolt:
     
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  16. Isn't that worth more than the bike? :)

    Just kidding, hope it's coming together well, when are you putting up a build thread?
     
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