7. CYLINDER HEAD/VALVES (Mongoose/KXR 90) Mongoose/KXR 90/50 Nuts CYLINDER HEAD REMOVE Remove the camshaft. (Refer to the "camshaft remove" section in the chapter 7) Remove the carburetor. (Refer to the "CARBURETOR REMOVE" section in the chapter 5) Remove the exhaust muffler. (Refer to the "EXHAUST MUFFLER REMOVE" section in the chapter 2) Intake Manifold Remove the two nuts and then remove the carburetor intake manifold. Remove the cooling fan cover. ( 14-8) Remove the engine cover bolts and screws. Separate the engine cover joint claws. CYLINDER HEAD DISASSEMBLY Remove the valve spring cotters, retainers, Valve Cotter Retainer Springs Springs Seat springs, spring seats, oil seals and valves using a valve spring compressor. · Be sure to compress the valve springs with a valve spring compressor. · Mark all disassembled parts to ensure correct reassembly. Special Valve Spring Compressor E040 Spring Compressor Oil Seal Valve 7-9