It is a helmet strap and the original owner of my bike must have kept it. I use a length of porch swing chain. Double it over the u-hook beneath the passenger seat. Use a short length for helmet and if want to secure jacket I run it through D rings on helmet and through one sleeve of the jacket. All is secure for honest people.
Now to find an owners manual
I can officially confirm that you can use this helmet strap to install your center stand. Mission accomplished yesterday, no damage made to the strap, holds good against the ratchet and it was easy to remove from under the spring after installation.
I ride a black 2015 Honda NC700X DCT, and I love it.
"Rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others. I do not add 'within the limits of the law' because law is often but the tyrant's will, and always so when it violates the rights of the individual." — Thomas Jefferson
Can you get replacement D-ring straps for helmets? I've never noticed them for sale which has made me wonder why someone would cut them to steal it.
Previous: Kawasaki MT1A 75 (small fat tires, auto clutch), CB400 (Hawk), and after a 20+ year hiatus a NC700X