Valve Specifications

Rocker Arm Ratio (1.6)
Valve Face Angle (45°)
Valve Face Runout 0.038 mm (0.0014 inch)
Valve Margin (Exhaust) 2.13-1.87 mm (0.083-0.073 inch)
Valve Margin (Inlet) 1.49-1.23 mm (0.058-0.048 inch)
Valve Head Diameter (Inlet) 37 mm (1.45 inch)
Valve Head Diameter (Exhaust) 44 mm (1.73 inch)
Valve Overall Length (Inlet) 134.23 mm (5.28 inch)
Valve Overall Length (Exhaust) 127 mm (5.00 inch)
Valve Stem to Guide Clearance:
(Inlet) 0.020-0.053 mm (0.007-0.0020 inch)
Valve Stem to Guide Clearance:
(Exhaust) 0.035-0.076 mm (0.0014-0.0029 inch)
Valve Guide Inside Diameter 7.000-7.020 mm (0.275-0.276 inch)
Valve Tip to Retainer Groove Centerline 4.97-5.46 mm (0.195-0.214 inch)
Valve Springs Free Length 48.7 mm (1.91 inch)
Valve Seat Width (Inlet) 2.80 mm (0.110 inch)
Valve Seat Width (Exhaust) 3.51 mm (0.138 inch)
Valve Spring Load:
(Closed) 361-324 Nm @ 40.64 mm (81.2-72.8 lbs. @ 1.600 inch)
Valve Spring Load:
(Open) 957 - 893 Nm @ 29.85 mm (215 - 201 lbs. @ 1.175 inch)