Jims Cylinder Torque Plates for Harley-Davidson

Used with stock cylinders from 3.75" (3-3/4") to 3.875" (3-7/8") diameter with OEM bolt pattern.

To accurately measure cylinder dimensions, torsion plates are essential.

These plates simulate the stress conditions during boring and honing, preventing distortion of the cylinder walls once they return to their original state.

The plates are laser engraved with the correct twisting sequence.

Fits: Twin Cam > 99-17