In my view all the Euro 4 bike rules do is to add cost without any real benefit to anyone.
But it should not be a surprise, they were developed by the same family of technical experts that produced the EU emission testing regulations for cars and we all know and respect their knowledge and understanding of the real world. Not.
Fortunately most of the rubbish can be reversed as mist if the changes are not included in the UK bike or car MOT.
I'm surprised that they didn't have to fit ABS, all Euro 4 bikes over 125cc must have it, perhaps as the M3W has 3 wheels this rule doesn't apply.