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Anyone know the part number for the oil drain plug sealing washer?
 

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Just go to an auto parts store and get 12mm aluminum crush washers. O'Reilly, Autozone, Advance Auto Parts, etc.
 

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Just go to an auto parts store and get 12mm aluminum crush washers. O'Reilly, Autozone, Advance Auto Parts, etc.
even some walmarts might have them, but those automotive stores are the best source for them.

how often should these be changed? i know some people don't change them every time.
 

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I change them as they start looking like they will not seal about five oil changes or so.

Also the part number is 90407-259-000 but auto parts stores will be cheaper.
 

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I put a Zeta red magnetic plug from a CRF230 in, after my oil change. I used the same washer. I'll replace on the next one.
 

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I wouldn't recommend just any 12 mm crush washer. I got the m12 "oil-tite" by Dorman and it failed on my bike. Both rubber sides warped badly and got an oil leak. Now looking for a better product (and time to clean the underside of my bike).
 

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