CrushWashers

Replacement Oil Drain Crush Washers

The crush washers can be obtained at your nearest Yamaha dealer, or similar washers can be obtained at Advanced Auto. The size is 1/2 (or M14) called oversize, crush washers.

Oil-tite part #65310

There come in a 3 pack.

Reference: http://forums.delphiforums.com/starroadliner/messages?msg=12637.15