Maintenance Specifications; Engine - Yamaha EF7000 Service Manual

MAINTENANCE SPECIFICATIONS

ENGINE

Piston:
Piston clearance
<Limit>
Piston skirt "D"
<Limit>
Measuring point "H"
Oversize 1st
2nd
Piston pin hole inside diameter
<Limit>
Piston pin:
Piston pin diameter
<Limit>
Piston ring:
Top ring
Type
Dimensions "B × T"
End gap
<Limit>
Side clearance
<Limit>
2nd ring
Type
Dimensions "B × T"
End gap
<Limit>
Side clearance
<Limit>
Oil ring
Type
Dimensions "B × T"
End gap
Cylinder head:
Warpage limit
Cylinder:
Inside diameter "D"
<Limit>
Taper limit
Warpage limit
MAINTENANCE SPECIFICATIONS
mm (in)
mm (in)
mm (in)
B
T
mm (in)
mm (in)
7-4
0.015–0.029 (0.0006–0.0011)
0.150 (0.0059)
84.977–84.998 (3.3456–3.3464)
84.900 (3.3425)
10 (0.4)
85.25 (3.3563)
85.50 (3.3661)
20.004–20.015 (0.7876–0.7880)
20.045 (0.7892)
19.955–20.000 (0.7856–0.7874)
19.930 (0.7846)
Barrel
1.2 × 3.1 (0.0472 × 0.1220)
0.20–0.35 (0.008–0.014)
0.6 (0.0236)
0.04–0.08 (0.0016–0.0031)
0.13 (0.0051)
Taper
1.2 × 3.2 (0.0472 × 0.1260)
0.30–0.45 (0.0118–0.0177)
0.8 (0.0315)
0.03–0.07 (0.0012–0.0028)
0.13 (0.0051)
3-piece type
2.5 × 2.5 (0.0984 × 0.0984)
0.20–0.70 (0.008–0.028)
0.1 (0.0039)
85.000–85.020 (3.3465–3.3472)
85.020 (3.3472)
0.05 (0.002)
0.05 (0.002)
SPEC