During the days of my ninja 650 (not that much different), I made bars with aluminum angles and strips.
The angle is for the main length to provide sturdy no-flex support; bent strips were connecting both ends to the license plate and passenger pegs.
Back then I used little bolts to join the 3 parts, but today I would braze with alumiweld of course.
It requires some thinking (take a strip of paper to test) on how to bend the strip at the correct angle to meet the peg/plate flat.
I don't have those anymore, no picture, sorry.
The peg's pin was replaced by a bolt long enough to fit the strip 1/8" thickness and a nyloc nut. If you don't find a metric bolt, you may have to drill the SAE size in the peg's bracket... (ex: 1/4" is larger than 6mm)
In the end, I went for sw motech hard cases, but the racks alone do a great soft-luggage protector (and double as soft crash bars, sort of.) Aluminum will fatigue and eventually crack. I know first hand.
Last edited by dddd; 09-22-2019 at 06:22 AM.