DISASSEMBLY OF BASIC ENGINE
5-2
1. Disassembling and inspecting cylinder head and valve mechanism
Disassembling and inspecting cylinder head and valve mechanism
Disassembling sequence
1 Rocker cover 8 Rocket shaft bracket 15 Valve retainer
2 Adjusting screw 9 Rocket shaft spring 16 Valve spring
3 Bolt (short) 10 Rocket shaft 17 Inlet valve
4 Bolt (long) 11 Push rod 18 Exhaust valve
5 Valve cap 12 Cylinder head bolt 19 Valve stem seal
6 Snap ring 13 Cylinder head 20 Cylinder head gasket
7 Rocker arm 14 Valve cotter
20
18
7
8
4
2
5
9
3
14
15
19
1
10
11
6
16
13
12
17
Replace
Replace
Fatigue, damage
Damaged threads,
worn rod contact surface
Wear
Worn valve cap contact surface,
clogged oil holes, worn bushings
Uneven wear on stems and faces,
damage, fatigue
Wear, clogged oil holes
Wear at both ends, deflection
Crack, carbon deposits,
water scale adhesion
Uneven wear
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