Since initial posting here, bike already has 10,000+ km, stock dunlops were replaced with shinko 705 dual sport tires (bigger front and heavier too). I did another freeway speed last sunday over 150kph, wiggle is still there (I rarely reach that speed anyway). It might be the tire balance, though we dont have many balancing shops here.
At 100-120kph, there is no wiggle, no vibration, no road imperfection felt and the tires are noisier than the exhaust.
ad astra per aspera