This is a high-quality piston from Suzuki, model RM100 1977-1978. It is an original equipment manufacturer (OEM) part, which means it is made to the same specifications as the part made by the manufacturer. This piston is compatible with Suzuki motorcycles and is perfect for those looking to replace their stock bore. The part number for this piston is 12110-41610, and it is suitable for use with a range of different Suzuki motorcycles. The brand name for the piston is Suzuki, and it is made to the highest quality standards. This item is listed in the eBay Motors category and is perfect for anyone looking to replace their stock bore with a high-quality, reliable piston.BX55