either buy a brand new one or use some blue silicone sparingly. otherwise you will have blue silicone spaghetti blocking oil galleries a la allan moffatt in the 70,s at bathurst. very dear from england at 80 dollars with postage ebay.com....65$usa.
http://www.ebay.com.au/itm/KAWASAKI...pt=UK_Motorcycle_Parts_13&hash=item2ec876dd61 Or http://www.partzilla.com/parts/detail/kawasaki/KP-11009-1779.html?gclid=CIfB5rvujr0CFc1YpQodQ3UAHA