Changes to Council Directive 87/56/EEC of 18 December 1986 amending Directive 78/1015/EEC on the approximation of the laws of the Member States relating to the permissible sound level and exhaust system of motorcycles
EU Directive 1987/56
No changes to Council Directive 87/56/EEC of 18 December 1986 amending Directive 78/1015/EEC on the approximation of the laws of the Member States relating to the permissible sound level and exhaust system of motorcycles are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.