Yes, I had an answer:
Thank you for writing to Kawasaki Motors UK.
We can confirm your vehicles V5 document is correct if as you suggest it is stating your 2020 model year Ninja Z1000SX is Euro 4 compliant. The Ninja Z1000SX is Type Approved as Euro 4 as the Type Approval for this model was issued before 1st January 2020.
Any motorcycle issued with a new Type Approval after the 1st January 2020 onwards will have to meet the new Euro 5 requirements.
Please be assured your V5 document does appear to be correct base on the details you have provided us and we would suggest there is no cause for concern.
Then (after I asked why was the press reporting it as being Eu5 compliant/ready and what restrictions were in pplace for Eu4 vehicles):
Thank you for your reply.
We are sorry to learn you feel you maybe faced with potential severe repercussions regarding environmental restrictions. We are not aware of any EU restrictions which could currently be imposed on Euro 4 compliant motorcycles. We would welcome your views on what restrictions you feel you may face.
In the meantime may we again confirm the Euro category (ie Euro 4/5) would be dependant upon the date a new vehicle was presented for European Whole Vehicle Type Approval. The new Ninja 1000SX was subject to Whole Vehicle Type Approval before 1st January 2020, therefore, your specific model is Euro 4 compliant.
We work closely with other European Distributors and can confirm the new Ninja 1000SX is widely available within all EU countries. As far as we can gather your motorcycle is not subjected to any European environmental restrictions which we are aware off.
Then (again after repeating my question re press reporting):
Kawasaki Motors have not implied at any point that the motorcycle conforms to, has been submitted for or has been homologated to Euro 5 WVTA.
Conversations with the press who may have attended model launches would have been very clear regarding the conformity of our new models under the current legislation.
It is a fact that new models have been produced with the demand for cleaner emissions as part of their development. The Euro 4 WVTA remains a current type approval for vehicle registration and will be subject to End of Series derogation.
Please be assured we have passed your comments onto our press department who work closely with the UK motorcycle journalists.
We sympathise with any confusion which may have arisen but trust the information we have provided offers you a clearer understand of your machines homologation category.