Sorted!!! Took me a while to find 30min to do it!
And again “many thanks” to bigbird for the information. It was indeed problem with ECT sensor - £10 from ebay for second hand Honda SP1 ECT sensor and 30 minutes to change it
I wonder since I have part form SP1 will it run faster?
Just a few practical comments if you come across changing ECT sensor:
Remove Seat and seat metal bracket – you will get very easy access to ECT sensor.
There is no need to drain coolant if scooter is cold. Just unscrew sensor with tall socket. No coolant will escape.
One again, bigbird, you are STAR!!!