4-5
ENG
CYLINDER AND PISTON INSPECTION
1. Eliminate:
8
Carbon deposits
Use a rounded scraper
1
.
2. Inspect:
8
Cylinder wall
Wear/Scratches
→
Rebore or replace.
3. Eliminate:
8
Carbon deposits
1
From the piston crown and ring
grooves.
4. Remove:
8
Score markes and lacquer deposits
From the sides of piston.
5. Inspect:
8
Piston wall
Wear/Scratches/Damage
→
Replace.
6. Measure:
8
Piston-to cylinder clearance
*************************************
Piston to cylinder clearance measurement
steps: First step:
8
Measure the cylinder bore “C” with a cylin-
der bore gauge.
NOTE:
Measure the cylinder bore “C” in parallel to and
at right angles to the crankshaft. Then, find the
average of the measurements.
CYLINDER AND PISTON INSPECTION
D
1
D
2
D
3
D
4
D
5
D
6
1
1
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
Инструкции и руководства похожие на YAMAHA YW50AT (2001)
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