Unlike the stock, cast, weak Clutch Cover that easy breaks in a fall over, this billet one won't break. It let's the 250 bikes with the DDS Clutch, which are the 17-22  FE, EXC and 19 SXF / XCF / FX / FC, use the Clutch Weight now as well.  It DOES NOT come with a new fill plug. You'll re use your stock one

Billet Clutch Cover for 2017-22 250 / 350 4-Strokes