Head Bolt

CYLINDER HEAD BOLT

Using vernier calipers, measure the length of the cylinder head set bolt from the seat to the end.
Standard bolt length:
146.8 to 148.2 mm (5.7795 to 5.8346 in.)
Maximum bolt length:
149.2 mm (5.874 in.)

If the bolt length is greater than the maximum, replace the cylinder head set bolt.
Using vernier calipers, measure the minimum diameter of the elongated thread at the measuring point.

Standard outside diameter:
9.77 to 9.96 mm (0.3846 to 0.3921 in.)
Minimum outside diameter:
9.4 mm (0.3701 in.)