Valve, Intake/Exhaust

Valve Timing
Intake Valve
Opens (ATDC) 3°
Closes (ABDC) 61°
Duration 238°
Centerline 122°
Exhaust Valve
Opens (BBDC) 56°
Closes (ATDC) 16°
Duration 252°
Centerline 112°
Valve Overlap 13°
Valve Seat Angle 45-45.5°
Valve Seat Runout (Max.) 0.051 mm (0.002 inch)
Valve Seat Width
Intake 0.75-1.25 mm (0.0295-0.0492 inch)
Exhaust 1.25-1.75 mm (0.0492-0.0689 inch)
Guide Bore Diameter (Std.) 6.975-7.00 mm (0.2746-0.2756 inch)
Valve Guide Height* 9.5-10.5 mm (0.3740-0.4134 inch)
*Measured from cylinder head surface
Valves
Face Angle 44.5-45°
Head Diameter
Intake 36.37-36.63 mm (1.4319-1.4421 inch)
Exhaust 28.87-29.13 mm (1.1366-1.1469 inch)
Length (Overall)
Intake 114.41-114.99 mm (4.5043-4.5272 inch)
Exhaust 125.67-126.25 mm (4.9476-4.9705 inch)
Stem Diameter
Intake 6.935-6.953 mm (0.2730-0.2737 inch)
Exhaust 6.906-6.924 mm (0.2719-0.2726 inch)
Stem-to-Guide Clearance
Intake
Standard 0.022-0.065 mm (0.0009-0.0026 inch)
(Max.) Rocking Method 0.29 mm (0.0114 inch)
Exhaust
Standard 0.051-0.094 mm (0.002-0.0037 inch)
(Max.) Rocking Method 0.370 mm (0.0146 inch)
Valve Lift (Zero Lash)
Intake 8.55 mm (0.3367 inch)
Exhaust 6.53 mm (0.2571 inch)
Valve Margin
Intake 0.835-1.165 mm (0.0329-0.0459 inch)
Exhaust 1.44-1.77 mm (0.0567-0.0697 inch)
Valve Stem Tip Height
Intake 42.366-43.655 mm (1.6680-1.7187 inch)
Exhaust 44.705-45.986 mm (1.760-1.8105 inch)