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.