Up for sale is WISECO DIRTBIKE PISTON .50MM YAMAHA 805M04800. The vendor part number is 805M04800. Please read title to know what you are getting. The catalog decription.... is WISECO ATV-DIRT BIKE PISTONS.*  All Wiseco 4 cycle pistons come complete with rings, wrist pins and circlips.*  Only Wiseco replacement ring sets can be used on Wiseco pistons.*  All Wiseco 2 cycle pistons are supplied with rings and circlips.*  Wiseco 2 cycle pistons are not supplied with a wrist pin unless noted in the description.