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Thread: Clean bearings?

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  1. #1
    K Bikes Complex by Choice cjack's Avatar
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    Apr 2003
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    Clean bearings?

    This is a quote from the Adv forum...I never investigated the clean bearing and am wondering how true this is.

    "Quote:
    I found absolutely no grease and the only lubrication I saw was blue? what? oh wait, it was redline sp lightweight. The same stuff I run in my gearbox. So why put sealed bearings in if they don't keep their life-long grease in?"

    "Answer:
    I was under the assumption that the bearings were packed with a lifetime grease and sealed. Turns out the bearings are actually 'clean bearings' and the seal is really a filter. They are in fact lubricated by the gear oil. Clean bearings are purported to outlast open bearings significantly."


    Rereading this, to clarify, this wasn't my answer. But one that was offered on the Adv forum. I am curious about this because finding dark oil drain out of the trans when changing fluid was normally thought to be that the grease was released from clean bearings.
    Last edited by cjack; 09-13-2009 at 02:56 PM.
    My other bike is a BMW.
    Jack Hawley MOA and RA #224, KE9UW ("Chuck")

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