Crankcase Assembly - Yamaha F150B Service Manual

Crankcase assembly

Item
Cylinder
Bore
Piston
Diameter
Measuring point
Piston clearance (*1)
Ring groove (Top)
Ring groove (2nd)
Ring groove (Oil)
Piston ring
End gap measuring point
Top ring
Type
Dimension height (B)
Dimension width (T)
End gap
Side clearance
2nd ring
Type
Dimension height (B)
Dimension width (T)
End gap
Side clearance
Oil ring
Dimension height (B)
Dimension width (T)
End gap
Side clearance
Connecting rod
Big end side clearance (*1)
Crankpin oil clearance (*1)
Crankshaft
Journal diameter
Crankpin diameter
Runout limit
Crankpin width
(*1) The figures are for reference only.
Unit
F150B
mm (in) 94.000–94.017 (3.7008–3.7014)
mm (in) 93.921–93.941 (3.6977–3.6985)
mm (in)
mm (in) 0.075–0.080 (0.0030–0.0031)
mm (in) 1.23–1.25 (0.0484–0.0492)
mm (in) 1.22–1.24 (0.0480–0.0488)
mm (in) 2.51–2.53 (0.0988–0.0996)
mm (in)
mm (in) 1.17–1.19 (0.0461–0.0469)
mm (in) 2.80–3.00 (0.1102–0.1181)
mm (in) 0.15–0.30 (0.0059–0.0118)
mm (in) 0.04–0.08 (0.0016–0.0031)
mm (in) 1.17–1.19 (0.0461–0.0469)
mm (in) 3.70–3.90 (0.1457–0.1535)
mm (in) 0.30–0.45 (0.0118–0.0177)
mm (in) 0.03–0.07 (0.0012–0.0028)
mm (in) 2.40–2.47 (0.0945–0.0972)
mm (in) 2.30–2.70 (0.0906–0.1063)
mm (in) 0.15–0.60 (0.0059–0.0236)
mm (in) 0.04–0.13 (0.0016–0.0051)
mm (in)
mm (in) 0.027–0.052 (0.0011–0.0020)
mm (in) 51.980–52.000 (2.0465–2.0472)
mm (in) 49.980–50.000 (1.9677–1.9685)
mm (in)
mm (in) 22.0–22.10 (0.8661–0.8701)
Power unit technical data
Model
FL150B
14.0 (0.55)
20.0 (0.8)
Barrel
Taper
0.14–0.31 (0.006–0.012)
0.03 (0.0012)
0
1
2
3
4
5
6
7
8
9
10
A
1-14