| i fitted it to the bike and it worked. it looked exactly the same as the old one i removed.
as for the crush washer i think it is the same size as the ducati one it is just that as you tighten it down it deforms to seal the fit, so looks smaller on the one you remove.
i did file some off the diameter of the washer just to play safe though.it is a very very sft metal. i think that if i had not filed it it would still have deformed to fit the hole. | 
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