2022 Matte Deep Blue Kymco AK 550
I had that same case on my ST1100. It did shake a fair amount. When I put it on that bike I had been reading reports of other cases, GIVI and others, having a latch failure and falling off while going down the road. This is not what causes the shaking but I had just read of that happening in certain RARE situations. This case does fit the tabs into the front holders loosely and that is what causes the shaking. I added a knobbed bolt with a wing nut through the center of the case and through the plate. I drilled a hole just back of the dimple in the bottom of the case and through the plate for the bolt. I also drilled a small hole through the bolt just below where the wing nut ended up when tight and put a small R clip through to prevent the wing nut from backing off. Never worried about it after that. I made my own rear mounting plate adapter for that bike using one of my wife's nylon cutting boards. Had to buy her a new one after that.