Have you ever seen a more primitive or less BMW-like device than the OE screw that secures the pillion seat (and/ or the rear cowl/ hump) from below? If - as is more than likely - crud and mud gets plastered onto the underside of the rear sub-frame of the bike it would make locating and removing that screw very tricky indeed. And even though my R9T was as clean as a whistle when it arrived, I still had the greatest difficulty removing that screw with the pathetic toy-like key/ tool that BMW provides. Enter from E-Bay a nicely-made brass knurled tool -
left in the first pic below - that requires only the fingers to fit and remove. It is chunky enough and protrudes far enough down to enable one to get a good grip in it, and is secured by a good-sized spring-washer, while a small rubber o-ring takes care of moisture entering the thread in this very exposed position. I have put a short length of PVC tube over the end of the tool to keep it free of dirt, and will probably fill-in the open end with some silicone later, to complete the job. Quite affordable at around $AUD21, but taking almost seven (7) weeks for delivery from China in these disrupted times.
Recommended.
Later edit: I didn't need to put a blob of silicone into the open lower end of the PVC tube, having found a small black plastic cap that is an exact push-fit
Pix below. Job now done. I realise that I will hardly ever need to access the atom-sized
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space below the pillion-seat, unless I wish to store a credit card there - which is about as much as it would take - but I will remove from the toolkit pouch the screwdriver handle used for topping-up the engine oil, and carry that with me if on longer rides.
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