Get the instructions Click on the image on the left to open the .pdf for specific machining instructions. This doc explains what to do to 1972 models. Bore the ID The stock ID is way too restrictive and will cause harshness if not drilled. Enlarge the compression feed Drill the two existing large compression damping holes to 6mm (1/4") and add 1 more sets of holes (4 holes total) at 10mm increments above the stock holes. Each set must be at 90 degrees to the last set. See .pdf. Fill the small holes Fill the top 3 sets of small holes with weld or JB Weld or other good epoxy. It is best to prepare for epoxy or welding by cutting a chamfer with a countersink so there is fresh metal. file and sand the high spots evenly with the existing surface. Do not remove existing metal from the damping rod surface. |