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YAMAHA YZ250F(Y) Owner's Service Manual Page 28

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Piston:
Piston to cylinder clearance
Piston size "D"
Measuring point "H"
Piston off-set
Piston pin bore inside diameter
Piston pin outside diameter
Piston rings:
Top ring:
Type
Dimensions (B × T)
End gap (installed)
Side clearance (installed)
2nd ring:
Type
Dimensions (B × T)
End gap (installed)
Side clearance
Oil ring:
Dimensions (B × T)
End gap (installed)
Crankshaft:
Crank width "A"
Runout limit "C"
Big end side clearance "D"
Item
MAINTENANCE SPECIFICATIONS
Standard
0.030–0.055 mm (0.0012–0.0022 in)
76.955–76.970 mm (3.0297–3.0303 in)
8 mm (0.31 in)
0.5 mm (0.020 in)/IN-side
16.002–16.013 mm (0.6300–0.6304 in)
15.991–16.000 mm (0.6296–0.6299 in)
Barrel
0.90 × 2.75 mm (0.04 × 0.11 in)
0.15–0.25 mm (0.006–0.010 in)
0.030–0.065 mm (0.0012–0.0026 in)
Taper
0.80 × 2.75 mm (0.03 × 0.11 in)
0.30–0.45 mm (0.012–0.018 in)
0.020–0.055 mm (0.0008–0.0022 in)
1.50 × 2.25 mm (0.06 × 0.09 in)
0.10–0.40 mm (0.004–0.016 in)
55.95–56.00 mm (2.203–2.205 in)
0.03 mm (0.0012 in)
0.15–0.45 mm (0.0059–0.0177 in)
2-6
Limit
0.1 mm (0.004
in)
----
----
----
16.043 mm
(0.6316 in)
15.971 mm
(0.6288 in)
----
----
0.50 mm (0.020
in)
0.12 mm (0.005
in)
----
----
0.80 mm (0.031
in)
0.12 mm (0.005
in)
----
----
----
0.05 mm (0.002
in)
0.50 mm (0.02
in)

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This manual also for:

Yz250f 2009, Yz250fy 2009

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  • Dave May 30, 2016 02:21:
    Really good really good really goodj