When empty the Twin G / Box takes 750 cc of oil to reach the bottom of the FLAT on the Dip stick.
E Bay Cams - to check the correct position use the Diagram below. It is not uncommon for these to have moved either when pressing in replacements or a poor interference fit.
E Bay Cams - to check the correct position use the Diagram below. It is not uncommon for these to have moved either when pressing in replacements or a poor interference fit.