Cylinder Block for Motorcycle and ATV Applications Compatible With YZ450F (2006–2009), WR450F (2007–2015), YFZ450R (2009–2023), and YFZ450X (2010–2011) Material: Aluminum Part Number: 2S2-11311-11-00 Dimensions: 100 mm × 95 mm × 94 mm; 102.8 mm × 40 mm × 27 mm Weight: 1134 g Color: Silver Quantity: 1 piece This cylinder block is designed as a direct replacement for the configuration.It features a 95 mm bore size and is intended to restore engine fitment and function.Installation requires standard mechanical expertise and appropriate tools.Instruction manual is not included.This is a replacement part from a third party.All brand/model references serve only to show intended compatibility.