Yamaha MZ250 2012, Дополнительное руководство по обслуживанию

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4-3
SPEC
MAINTENANCE SPECIFICATIONS
Model name: MZ250 MZ300
Model code number:
7KBJ 7KBN 7VBJ 7VBN
Piston: mm (in)
Piston clearance 0.023–0.037
(0.0009–0.0015)
0.033–0.047
(0.0013–0.0019)
<Limit> 0.05 (0.0020) 0.06 (0.0024)
Piston skirt diameter “D” 73.97–73.99
(2.9122–2.9130)
79.960–79.980
(3.1480–3.1488)
<Limit>
73.92 (2.910) 79.91 (3.146)
Measuring point “H”
10 (0.4)
Oversize 1st 74.25 (2.9232) 80.25 (3.1594)
2nd
74.5 (2.9331) 80.5 (3.1693)
Piston pin hole inside diameter
19.004–19.015 (0.7482–0.7486)
<Limit>
19.045 (0.7498)
Piston pin: mm (in)
Piston pin diameter
18.995–19.000 (0.7478–0.7480)
<Limit>
18.975 (0.7470)
Piston ring: mm (in)
Top ring
Type
Barrel
Dimensions “B × T” 1.2 × 2.8
(0.0472 × 0.1102)
1.2 × 2.9
(0.0472 × 0.1142)
End gap 0.15–0.30
(0.0059–0.0118)
0.20–0.35
(0.0079–0.0138)
<Limit>
0.55 (0.0217) 0.6 (0.0236)
Side clearance
0.04–0.08 (0.0016–0.0031)
<Limit>
0.13 (0.0051)
2nd ring
Type
Taper
Dimensions “B × T” 1.2 × 3.0
(0.0472 × 0.1181)
1.2 × 3.2
(0.0472 × 0.1260)
End gap 0.15–0.30
(0.0059–0.0118)
0.20–0.35
(0.0079 × 0.0138)
<Limit>
0.65 (0.0256) 0.7 (0.0276)
Side clearance
0.03–0.07 (0.0012–0.0028)
<Limit>
0.13 (0.0051)
Oil ring
Type
3-piece type
Dimensions “B × T” 2.5 × 2.5 (0.0984 × 0.0984)
End gap
0.2–0.7 (0.0079–0.0276)
Cylinder head: mm (in)
Warpage limit
0.05 (0.002)
MAINTENANCE SPECIFICATIONS
ENGINE
B
T