This Wiseco piston kit is the perfect addition for your 92-01 KX250 engine. With a standard bore of 66.36mm, it is designed for a 2-stroke engine type and includes all the necessary parts for installation. The kit is specifically designed for motorcycle and scooter parts and accessories and is ideal for those looking to upgrade their engine. The manufacturer part number is 737M06640 and it is made by Wiseco, a trusted brand in the industry.