6. CYLINDER HEAD/VALVES DOWNTOWN 125i INSTALLATION Punch Marks Turn the A.C. generator flywheel so that the "T" mark on the flywheel aligns with the index mark on the crankcase. Keep the round hole on the camshaft gear facing up and align the punch marks on the camshaft gear with the cylinder head surface (Position the intake and exhaust cam lobes down.) and install the cam chain onto the camshaft gear. Round Hole Cam shaft Install the rocker arms shafts fixed bolt . Bolt Install the camshaft gear Camshaft Gear 6-10