SERVICING INFORMATION 10-49 SERVICE DATA VALVE + VALVE GUIDE Unit: mm (in) ITEM STANDARD LIMIT Valve diam. IN. 30 — (1.18) EX. 24 — (0.94) Valve clearance (when cold) IN. 0.10 – 0.20 — (0.004 – 0.008) EX. 0.20 – 0.30 — (0.008 – 0.012) Valve guide to valve stem IN. 0.010 – 0.037 — clearance (0.0004 – 0.0015) EX. 0.030 – 0.057 — (0.0012 – 0.0022) Valve guide I.D. IN. & EX. 4.500 – 4.512 — (0.1772 – 0.1776) Valve stem O.D. IN. 4.475 – 4.490 — (0.1762 – 0.1768) EX. 4.455 – 4.470 — (0.1754 – 0.1760) Valve stem deflection IN. & EX. — 0.25 E (0.010) Valve stem runout IN. & EX. — 0.05 L (0.002) Valve head thickness IN. & EX. P — 0.5 (0.02) Valve seat width IN. & EX. 0.9 – 1.1 — M (0.035 – 0.043) Valve head radial runout IN. & EX. — 0.03 A (0.001) Valve spring free length SIN. & EX. — 37.5 (1.48) Valve spring tension IN. & EX. Approx. 147 N (15.0 kgf, 33.1 lbs) — at length 33.55 mm (1.32 in) CAMSHAFT + CYLINDER HEAD Unit: mm (in) ITEM STANDARD LIMIT Cam height IN. 37.58 – 37.63 37.28 (1.480 – 1.481) (1.468) EX. 36.28 – 36.33 35.98 (1.428 – 1.430) (1.417) Camshaft journal oil clearance IN. & EX. 0.032 – 0.066 0.150 (0.0013 – 0.0026) (0.0059) Camshaft journal holder I.D. IN. & EX. 24.012 – 24.025 — (0.9454 – 0.9459) Camshaft journal O.D. IN. & EX. 23.959 – 23.980 — (0.9433 – 0.9441) Camshaft runout — 0.10 (0.004) Cam chain pin (at arrow “3”) 14th pin — Cylinder head distortion — 0.20 (0.008)