Nate & the Kirby handle...
Hello & good morning Nate.
Bill nailed most all of the info above for your Kirby Heritage II.
The yoke may be slightly bent out in front; & if its been this way for quite a while, it may have rubbed & worn away on the shell casting. Sometimes the tab can be bent back, this may prove to be only a temporary fix, depending on if & how badly it may be worn.
One thing that is not mentioned above, if it's loose, & could be the problem is, the little 'tab' on the handle fork yoke, (what you slip the handle into), may be broken off.
(If you'd post a photo or two of it, it may help assist you better.)
Hopefully Bill's or Bill's info will help you, Nate. (~~lol~~)
Cheers & hagwknd all,
Bill
Ps: Shoot me an email Nate, & I'll send you my contact info.