Removing the ignition distributor

Set one piston at top dead center and fit the dial gauge, setting it at zero. Remove the distributor and, after repairing it, refit it, making sure it is timed correctly. Check the advance in both cylinders and ensure that the point gap is set at 4 mm. If no repairs are being made to the ignition distributor, it is not necessary to remove it. When repairing the distributor, however, be careful not to remove the half-bush under it which retains the central conical gear and shims.