Motorcycle Cylinder Head Base Gasket For Kawasaki KLE500 KLE400 ER500 ER-5 1991-2004 Engine Parts Fit For Kawasaki KLE500 1991-2003 KLE400 1991-1994 1999 ER500 ER-5 1997-2004 parallel twin adventure street bikes cylinder to head base sealing assembly OEM pre-cut contour with aligned bolt holes coolant channels oil passages; direct bolt on replacement without grinding or reshaping Multi layer temperature composite material withstands long distance touring engine sustained vibration; anti thermal deformation oil Forms airtight compression barrier to eliminate blow by power loss coolant leakage oil seepage during highway off road mixed riding Uniform consistent thickness delivers full flush contact between cylinder block cylinder head; prevents persistent sealing gaps extends engine overhaul life