With a aftermarket 27 cent Ace Hardware reusable Cotter Pin Pull System, you should be able to obtain the 72.5 lbs desired.
What you're using, if I'm seeing correctly, is called a hairpin. I use the same on my Ninja. After losing I don't know how many bags of cotter pins, I just started buying hairpins. Easier to remove, (Which DOESN'T mean they fall off easier!), and no hunting for that bag you bought last tire change...
$.25 part, one time use, or $.50 part, use as many times as needed... Hmm... Simple decision.