Cylinder Head and Cylinder Barrel.
Removal. (Refer to Figure 5-23).
Remove two screws (1), rocker cover (2), and gasket (3).
Scrape old gasket (3) off cylinder head (9).
Alternately loosen five nuts (4), 1/4-turn at time, starting at rocker support stud (5). (Refer to cylinder
head nuts sequence.) Remove nuts (4) and washers (6).
Remove rocker arm assembly (7), and o-ring (8) from cylinder head (9).
Remove and tag two push rods (10).
Remove cylinder head (9), two push rod tubes (11), four seals (12), and gasket (13) from cylinder
Remove cylinder barrel (14) and gaskets (25) from crankcase (18).
Remove two screws (15) from housing (16) Remove housing (16) and gasket (17) from crankcase
If lever and stop (19) are being removed to replace cylinder head (9), do not remove
lever (20) from shaft (21).
Remove studs (22) from cylinder head (9)
Clean threads (23) in cylinder head (9) with thread-cutting tap.
Pull spring pin (24) out of shaft (21).
Pull shaft (21) out of cylinder head (9).
Remove preformed packing (26) from shaft (21).
Drive shaft (21) and bushing (27) from lever (20).
Remove adjusting screw (28) and locking nut (29)
Dry cleaning solvent is flammable. Keep solvent away from open flames or sparks
Avoid inhaling solvent fumes or contact with skin.
Clean mating surfaces of cylinder head (9). Use brush cleaning tool, solvent and wiping rag.
Inspect cylinder head (9), valves, springs and valve seats for damage. Replace as required.