Yamaha XV19SW 2006, Service Manual

Page: 30 / 145

ENGINE SPECIFICATIONS
2-5
Valve guide inside diameter (exhaust) 6.000–6.012 mm (0.2362–0.2367 in)
Limit 6.050 mm (0.2382 in)
Valve-stem-to-valve-guide clearance (intake) 0.010–0.037 mm (0.0004–0.0015 in)
Limit 0.080 mm (0.0032 in)
Valve-stem-to-valve-guide clearance (exhaust) 0.025–0.052 mm (0.0010–0.0020 in)
Limit 0.100 mm (0.0039 in)
Valve stem runout 0.010 mm (0.0004 in)
Valve spring
Free length (intake) 46.71 mm (1.84 in)
Limit 44.71 mm (1.76 in)
Free length (exhaust) 46.71 mm (1.84 in)
Limit 44.71 mm (1.76 in)
Installed length (intake) 32.66 mm (1.29 in)
Installed length (exhaust) 32.66 mm (1.29 in)
Spring rate K1 (intake) 16.58 N/mm (94.67 lb/in) (1.69 kgf/mm)
Spring rate K2 (intake) 21.98 N/mm (125.51 lb/in) (2.24 kgf/mm)
Spring rate K1 (exhaust) 16.58 N/mm (94.67 lb/in) (1.69 kgf/mm)
Spring rate K2 (exhaust) 21.98 N/mm (125.51 lb/in) (2.24 kgf/mm)
Installed compression spring force (intake) 217.00–249.00 N (48.78–55.98 lb) (22.13–
25.39 kgf)
Installed compression spring force (exhaust) 217.00–249.00 N (48.78–55.98 lb) (22.13–
25.39 kgf)
Spring tilt (intake) 2.5 °/2.0 mm
Spring tilt (exhaust) 2.5 °/2.0 mm
Winding direction (intake) Clockwise
Winding direction (exhaust) Clockwise
Valve lifter
Valve lifter outside diameter (intake) 22.962–22.974 mm (0.9040–0.9045 in)
Valve lifter outside diameter (exhaust) 22.962–22.974 mm (0.9040–0.9045 in)
Valve lifter hole inside diameter (intake) 23.000–23.021 mm (0.9055–0.9063 in)
Valve lifter hole inside diameter (exhaust) 23.000–23.021 mm (0.9055–0.9063 in)
Valve-lifter-to-valve-lifter-hole clearance 0.026–0.059 mm (0.0010–0.0023 in)
Valve push rod
Valve push rod 1 length 286.5 mm (11.280 in)
Valve push rod 2 length 288.5 mm (11.358 in)