Maintenance Specifications; Engine Specifications - Yamaha YZ250(R)/LC Owner's Service Manual

EC212000

MAINTENANCE SPECIFICATIONS

EC212100
ENGINE
Item
Cylinder head:
Combustion chamber capacity
Warp limit
Cylinder:
Bore size
Taper limit
Out of round limit
Piston:
Piston size/
Measuring point*
Piston clearance
Piston offset
Piston pin:
Piston pin outside diameter
Piston ring:
Sectional sketch
End gap (installed)
Side clearance (installed) : 1st
Crankshaft:
Crank width "A"
Runout limit "C"
Connecting rod big end
side clearance "D"
Small end free play "F"
Clutch:
Friction plate thickness
Quantity
Clutch plate thickness
Quantity
Warp limit
Clutch spring free length
Quantity
MAINTENANCE SPECIFICATIONS
USA, CDN, ZA,
AUS, NZ
21.0 cm
(0.739 Imp oz,
0.710 US oz)
...
66.400~66.414 mm
(2.6142~2.6147 in)
...
...
66.352~66.367 mm
(2.6120~2.6129 in)
17.5 mm (0.69 in)
0.045~0.050 mm
(0.0018~0.0020 in)
1.5 mm (0.059 in)/EX-side
17.995~18.000 mm
(0.7085~0.7087 in)
Plain
B=1.0 mm (0.039 in)
T=2.55 mm (0.100 in)
0.40~0.55 mm (0.016~0.022 in)
0.030~0.065 mm (0.0012~0.0026 in)
: 2nd 0.030~0.065 mm (0.0012~0.0026 in)
59.95~60.00 mm (2.360~2.362 in)
0.03 mm (0.0012 in)
0.25~0.75 mm (0.010~0.030 in)
0.4~1.0 mm (0.016~0.039 in)
2.9~3.1 mm (0.114~0.122 in)
8
1.5~1.7 mm (0.059~0.067 in)
7
...
50.0 mm (1.969 in)
6
2-3
Standard
EUROPE
21.5 cm
3 3
(0.757 Imp oz,
0.727 US oz)
...
SPEC
Limit
...
0.03 mm (0.0012 in)
66.5 mm (2.618 in)
0.05 mm (0.0020 in)
0.01 mm (0.0004 in)
...
...
0.1 mm (0.004 in)
...
17.975 mm
(0.7077 in)
...
...
...
0.95 mm (0.037 in)
0.1 mm (0.004 in)
0.1 mm (0.004 in)
...
0.05 mm (0.0020 in)
...
2.0 mm (0.08 in)
2.8 mm (0.110 in)
...
...
...
0.2 mm (0.008 in)
48.0 mm (1.890 in)
...