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Discussion Starter #1
each time I remove the shorter of the two oil screens on my 2009 exc400 the inner most o-ring (one deepest in the engine) is always wrecked. Just wondering if anyone else has same experience and any theories on what's happening? Assume it's the high oil temperature in these machines that's making it stick and ultimately shredding it when removed removed? Doesn't seem to be causing any particular problem - should I be concerned?
 
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