Yamaha 2007 FZ6-NA Service Manual

Contents

ENGINE SPECIFICATIONS2-5Valve-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 0.040 mm (0.0016 in)Cylinder head valve seat width (intake) 0.90–1.10 mm (0.0354–0.0433 in)Limit 1.6 mm (0.06 in)Cylinder head valve seat width (exhaust) 0.90–1.10 mm (0.0354–0.0433 in)Limit 1.6 mm (0.06 in)Valve springInner springFree length (intake) 37.04 mm (1.46 in)Limit 35.20 mm (1.39 in)Free length (exhaust) 41.79 mm (1.65 in)Limit 39.70 mm (1.56 in)Installed length (intake) 30.02 mm (1.18 in)Installed length (exhaust) 36.12 mm (1.42 in)Spring rate K1 (intake) 10.50 N/mm (59.96 lb/in) (1.07 kgf/mm)Spring rate K2 (intake) 17.00 N/mm (97.07 lb/in) (1.73 kgf/mm)Spring rate K1 (exhaust) 30.26 N/mm (172.78 lb/in) (3.09 kgf/mm)Spring rate K2 (exhaust) 49.53 N/mm (282.82 lb/in) (5.05 kgf/mm)Installed compression spring force (intake) 69–79 N (15.51–17.76 lbf) (7.04–8.06 kgf)Installed compression spring force (exhaust) 160–184 N (35.97–41.36 lbf) (16.32–18.76kgf)Spring tilt (intake) 2.5 °/1.6 mm (0.06 in)Spring tilt (exhaust) 2.5 °/1.8 mm (0.07 in)Winding direction (intake) Counter clockwiseWinding direction (exhaust) ClockwiseOuter springFree length (intake) 38.40 mm (1.51 in)Limit 36.50 mm (1.44 in)Installed length (intake) 32.52 mm (1.28 in)Spring rate K1 (intake) 20.80 N/mm (118.77 lb/in) (2.12 kgf/mm)Spring rate K2 (intake) 33.30 N/mm (190.14 lb/in) (3.40 kgf/mm)Installed compression spring force (intake) 114–132 N (25.63–29.67 lbf) (11.62–13.46kgf)Spring tilt (intake) 2.5 °/1.7 mm (0.07 in)Winding direction (intake) ClockwiseCylinderBore 65.500–65.510 mm (2.5787–2.5791 in)Taper limit 0.050 mm (0.0020 in)Out of round limit 0.050 mm (0.0020 in)