I purchased this recently in an attempt to make using the side stand on my FZ6S easier. Every other bike I've owned has always had a little prong welded on near the foot of the stand, and I've found it a bit awkward twisting my foot to get a toe or heel in the right place to flick the stand down in one swift/smooth movement, especially when wearing my Alpinestars boots. Anyway, this prong works a treat, but on the FZ6S, the bracket of the prong catches on the centre stand, preventing the side stand from fully retracting. So not ideal, and hence it's for sale.
However, it really does make a difference if you find it difficult to put the side stand down, or up, whilst sitting on your bike, especially if wearing sports-style boots, it's just more suited to bikes without a centre stand fitted.
The item is listed on eBay (£8.00 inc P&P):
https://www.ebay.co.uk/itm/325673445350