Broken Seat Lock Mechanism

Any Honda seat lock of the same type can be altered by swapping the "pins" that "key" it ....... (I assume you have the one that bolts onto a tab with two "Phillips" screws)......I'll look and see what's laying around my junkyard....

Just two "pins" are more than sufficient to "work" the lock so that your key is the likeliest to open it (but not the only one that will)..... You'll have the same "sorting" to do with the replacement lock, so save those original "pins" and springs..... Actually, there is no real reason that you have to have it "fixed" (with the pins) other than enough that SOME key has to be inserted to open it.......I generally just use one "pin" somewhere near the middle of the cylinder, but you can use as many or as few as feels right for you.....You just trial fit until inserting the key pulls them all down flush