Valve Inspection

Intake Valve Dimensions 

A Standard (New): 26.9-27.1 mm (1.06-1.07 in.) 

B Standard (New): 117.20-117.50 mm (4.614-4.626 in.) 

C Standard (New): 5.480-5.490 mm (0.2157-0.2161 in.) 

C Service Limit: 5.44 mm (0.214 in.) 

D Standard (New): 0.85-1.15 mm (0.033-0.045 in.) 

D Service Limit: 0.65 mm (0.026 in.) 

Exhaust Valve Dimensions 

A Standard (New): 22.9-23.1 mm (0.90-0.91 in.) 

B Standard (New): 116.71-117.01 mm (4.595-4.607 in.) 

C Standard (New): 5.450-5.460 mm (0.2146-0.2150 in.) 

C Service Limit: 5.41 mm (0.213 in.) 

D Standard (New): 1.05-1.35 mm (0.041-0.053 in.) 

D Service Limit: 0.95 mm (0.037 in.) 

Fig 1: Identifying Intake Valve Dimensions

Courtesy of AMERICAN HONDA MOTOR CO., INC.