Valve, Intake/Exhaust

DIMENSIONS
Check dimensions of each valve. When the valve head has been worn down to 0.5 mm (0.020 inch) in margin thickness, replace the valve. The grinding allowance for the valve stem tip is 0.2 mm (0.008 inch) or less. The valve spring free height is 44.6 mm (1.756 inch), the pressure is 548.70 N (123.37 lbs.) @ a height of 26.0 mm (1.024 inch) and the squareness of each valve spring is less than 1.9 mm (0.075 inch).

Clearance (Hot):
Intake and Exhaust: 0.31 - 0.41 mm (0.013 - 0.016 inch)

Head Diameter "D":
Intake: 36.5 - 36.7 mm (1.437 - 1.445 inch)
Exhaust: 31.2 - 31.4 mm (1.228 - 1.236 inch)

Length "L":
Intake: 101.17 - 101.47 mm (3.9831 - 3.9949 inch)
Exhaust: 98.67 - 98.97 mm (3.8846 - 3.8964 inch)

Margin "T":
Intake: 0.95 - 1.25 mm (0.0374 - 0.0492 inch)
Exhaust: 1.15 - 1.45 mm (0.0453 - 0.0571 inch)

Margin "T" Limit: More Than 0.5 mm (0.020 inch)

Seat Angle "alpha": 45° 15' - 45° 45'

Stem Diameter "d":
Intake: 6.965 - 6.980 mm (0.2742 - 0.2748 inch)
Exhaust: 6.945 - 6.960 mm (0.2734 - 0.2740 inch)

Stem End Surface Grinding Limit: Less Than 0.2 mm (0.008 inch)