6. CYLINDER HEAD/VALVES K-XCT 125i ASSEMBLY Rocker Arm Shafts Apply engine oil to the rocker arms and rocker arm shafts. Install the rocker arms and shafts into the camshaft holder. Install the exhaust valve rocker arm shaft on the "EX" side of the camshaft holder Clean the intake valve rocker arm shaft off any grease before installation. 6-7