Changes to Council Directive 89/235/EEC of 13 March 1989 amending Directive 78/1015/EEC on the approximation of the laws of the Member States on the permissible sound level and exhaust systems of motorcycles
EU Directive 1989/235
No changes to Council Directive 89/235/EEC of 13 March 1989 amending Directive 78/1015/EEC on the approximation of the laws of the Member States on the permissible sound level and exhaust systems of motorcycles are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.