Yamaha XT250X Service Manual page 24

Winding direction (intake)
Winding direction (exhaust)
Outer spring
Free length (intake)
Limit
Free length (exhaust)
Limit
Installed length (intake)
Installed length (exhaust)
Spring rate K1 (intake)
Spring rate K2 (intake)
Spring rate K1 (exhaust)
Spring rate K2 (exhaust)
Installed compression spring force (intake)
Installed compression spring force (exhaust)
Spring tilt (intake)
Spring tilt (exhaust)
Winding direction (intake)
Winding direction (exhaust)
Cylinder
Bore
Wear limit
Taper limit
Out of round limit
Warp limit
Piston
Piston-to-cylinder clearance
Limit
Diameter D
Height H
ENGINE SPECIFICATIONS
Counter clockwise
Counter clockwise
36.63 mm (1.44 in)
34.63 mm (1.36 in)
36.63 mm (1.44 in)
34.63 mm (1.36 in)
32.00 mm (1.26 in)
32.00 mm (1.26 in)
30.90 N/mm (176.44 lb/in) (3.15 kgf/mm)
40.80 N/mm (232.97 lb/in) (4.16 kgf/mm)
30.90 N/mm (176.44 lb/in) (3.15 kgf/mm)
40.80 N/mm (232.97 lb/in) (4.16 kgf/mm)
128.50–157.90 N (28.89–35.50 lbf)
(13.10–16.10 kgf)
128.50–157.90 N (28.89–35.50 lbf)
(13.10–16.10 kgf)
2.5 °/1.6 mm
2.5 °/1.6 mm
Clockwise
Clockwise
74.000–74.016 mm (2.9134–2.9140 in)
74.100 mm (2.9173 in)
0.050 mm (0.0020 in)
0.010 mm (0.0004 in)
0.10 mm (0.0039 in)
0.010–0.025 mm (0.0004–0.0010 in)
0.15 mm (0.0059 in)
73.983–73.998 mm (2.9127–2.9133 in)
11.0 mm (0.43 in)
2-5