Motorcycle Engine Parts Bore Size 77mm Air Cylinder Block Fits For KXF250 2004-2008 KXF 250 This engine component is designed for use with specific motorcycle models.It features a bore size of 77mm and functions as an air cylinder block.It is compatible with KXF250 models from 2004 to 2008.The part is intended for engine repair or rebuilding applications where bore diameter and fitment are critical.It replaces the cylinder block and supports standard engine when installed correctly. This is an aftermarket accessory.Brand names and model numbers are referenced strictly for compatibility information.