"Thanks PieEater", your input is appreciated. video link: youtube.com/watch?v=G2yvGiqrfS8 - I figured out that there's a test mode in the Diagnostics menu "Code 53" and can confirm the EXUP valve performs as in the video link. All's well then, at least it's turning there, but not when I rev her up? lol. ... maybe as you said, the valve is for "noise reasons", perhaps when in a particular gear / rev range under load? Thanks again. ps: On another note, The Bike is simply awesome 
.. and the lack of torque under 4k seems to be normal then looking at reviews! kind regards, Scotty
.. and the lack of torque under 4k seems to be normal then looking at reviews! kind regards, Scotty
If you don't ride, you don't know the freedom of the open road!