It'll fit, it's exactly the same except for the fold out hooks they added to the later seat pan
Sent from my XT1080 using Tapatalk
and also the revised perch under the buddy seat area that sits far back on the spine of the rear frame extension - which is why the Power Commander installations are wrong for the later seats, as where they say to put the PC is exactly where the perch is. (that is unless the PC install instructions have been updated but I'll bet they haven't been.
Regardless, early and later seats fit all 919s.
I had problems sliding around on my stock seat plus the vinyl was getting sun hard in spots. To get a shop to customize and re-cover seat meant an expensive and time consuming shipment of seat since I live in a remote place. So I re-covered the seat myself.
I brought a cover from an eBay seller, http://www.ebay.co.uk/itm/13249163958
, a polish company. Wijalis. Got myself a staple gun and had a go myself. I'm very happy with the new cover but not entirely happy with my work. The new seat is great. Very grippy, I no longer slide forward or back. I did not add a gel pad the new cover is quite thick and has a 5mm foam layer underneath making it softer than the stock.