Motorcycle Bore 95mm Air Cylinder Block Fits For YZ450F 2006-2009 WR450F 2007-2015 2S2-11311-00-00 2S2-11311-10-00 This air cylinder block features a 95mm bore diameter designed to fit specific motorcycle models including the YZ450F from 2006 to 2009 and the WR450F from 2007 to 2015.It is compatible with part numbers 2S2-11311-00-00 and 2S2-11311-10-00.The unit is built for use in engine rebuilds or performance where increased displacement is This replacement part is manufactured independently.All brand references are used solely to denote compatibility with listed models.