Join Date: Apr 2017
Location: Melbourne. Australia
That is a good idea and the work looks neat. Whether it fit roadworthy safety laws , I can tell, but I love the idea of the moveable backrest for long trips.
I don't know how likely to to have a rear end crash on a bike , also given how high the top box is , the chances are lower, but not impossible.
Solution: use rails that collapse into itself or a rail into a rail , secured by thick screw or something that will break in case of a strong impact (the end facing the front of the bike needs a strong plate to hold the incoming rail) . By doing that the pillion wont have a road in the back but a push from the backrest.
Suzuki people will tell that you are moving the center of gravity of the bike and such and such.. but that happens every time we add anything into the top box.
Just a bit of safe engineering added to a great idea.