Valve System

GENERAL SPECIFICATIONS

Valve System
Valves
Valve Face Angle 45 degrees
Valve Face Width 1.25 mm (0.05 inch)
Valve Lash Net Lash - No Adjustment
Valve Lift - Intake 11.79 mm (0.464 inch)
Valve Lift - Exhaust 12.16 mm (0.479 inch)
Valve Seat Angle 46 degrees
Valve Seat Runout 0.05 mm (0.002 inch)
Valve Seat Width - Exhaust 1.78 mm (0.07 inch)
Valve Seat Width - Intake 1.02 mm (0.04 inch)
Valve Stem Diameter - Production 7.955 - 7.976 mm (0.313 - 0.314 inch)
Valve Stem Diameter - Service 7.95 mm (0.313 inch)
Valve Stem-to-Guide Clearance - Production - Intake 0.025 - 0.066 mm (0.001 - 0.0026 inch)
Valve Stem-to-Guide Clearance - Service - Intake 0.093 mm (0.0037 inch)
Valve Stem-to-Guide Clearance - Production - Exhaust 0.025 - 0.066 mm (0.001 - 0.0026 inch)
Valve Stem-to-Guide Clearance - Service - Exhaust 0.093 mm (0.0037 inch)
Rocker Arms
Valve Rocker Arm Ratio 1.70:1
Valve Springs
Valve Spring Free Length 52.9 mm (2.08 inch)
Valve Spring Installed Height 45.75 mm (1.8 inch)
Valve Spring Load - Closed 340 N at 45.75 mm (76 lbs. at 1.8 inch)
Valve Spring Load - Open 980 N at 33.55 mm (220 lbs. at 1.32 inch)