7. CYLINDER HEAD/VALVES MXU 250R/300R Intake Manifold CYLINDER HEAD REMOVE Remove the camshaft (page 7-4). Remove the carburetor. (Refer to the "carburetor remove" section in the chapter 5) Remove the exhaust muffler (page 2-11). Remove the two bolts and then remove the carburetor intake manifold. Bolts Thermostat Bolts Remove the bolt and disconnect the thermostat. Remove the two cylinder head bolts. Remove the cylinder head. Bolt Valve Cotter Retainer Springs Springs Seat CYLINDER HEAD DISASSEMBLY Remove the valve spring cotters, retainers, 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. Spring Compressor Oil Seal Valve Special tool: Valve Spring Compressor E040 7-10