Went to local bikeshop to do a dyno run, they politely pointed vacuum leaks in the intake manifold "joints" that I tried to plug with duct tape or "Jezus tape" as we call it in Finland, well Jezus does not work, or it does for 30 mins or so but then the glue gives up and it leaks, did a quick fix and plugged the intake holes with brake caliper rubber plugs and no more vacuum leaks.
After the fix the Air/fuel ratio was almost spot on around 13,2 all through the rpm range which was pretty amazing.
Had to do a 0-100km/h test, new record! yippikaiyee mf.