ENGINE SPECIFICATIONS
2-5
Valve stem runout 0.010 mm (0.0004 in)
Cylinder head valve seat width (intake) 1.00–1.20 mm (0.0394–0.0472 in)
Limit 1.6 mm (0.06 in)
Cylinder head valve seat width (exhaust) 1.00–1.20 mm (0.0394–0.0472 in)
Limit 1.6 mm (0.06 in)
Valve spring
Free length (intake) 42.43 mm (1.67 in)
Limit 40.31 mm (1.59 in)
Free length (exhaust) 42.43 mm (1.67 in)
Limit 40.31 mm (1.59 in)
Installed length (intake) 35.00 mm (1.38 in)
Installed length (exhaust) 35.00 mm (1.38 in)
Spring rate K1 (intake) 24.75 N/mm (141.32 lb/in) (2.52 kgf/mm)
Spring rate K2 (intake) 34.93 N/mm (199.45 lb/in) (3.56 kgf/mm)
Spring rate K1 (exhaust) 24.75 N/mm (141.32 lb/in) (2.52 kgf/mm)
Spring rate K2 (exhaust) 34.93 N/mm (199.45 lb/in) (3.56 kgf/mm)
Installed compression spring force (intake) 171–197 N (38.44–44.29 lbf) (17.44–20.09 kgf)
Installed compression spring force (exhaust) 171–197 N (38.44–44.29 lbf) (17.44–20.09 kgf)
Spring tilt (intake) 2.5 °/1.9 mm
Spring tilt (exhaust) 2.5 °/1.9 mm
Winding direction (intake) Clockwise
Winding direction (exhaust) Clockwise
Cylinder
Bore 100.000–100.010 mm (3.9370–3.9374 in)
Taper limit 0.050 mm (0.0020 in)
Out of round limit 0.050 mm (0.0020 in)
Piston
Piston-to-cylinder clearance 0.030–0.055 mm (0.0012–0.0022 in)
Limit 0.15 mm (0.0059 in)
Diameter D 99.955–99.970 mm (3.9352–3.9358 in)
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