fork lock

[Gene]

I just bought a 1976 CB 750K.  Does anyone know which key is supposed to fit the fork lock?
. I have an ignition key and a key for the seat lock, and neither one fits. Thanks.

[Re-run]

If neither fits, the lock may not work anymore or the ignition was changed out. On my 78k the fork lock is part of the ignition switch. So I am assuming your ign key should be the same for the fork lock but then my ign key also opens my seat.

[Gene]

Well, I have, for now, sprayed in WD-40, in case the lock is frozen.  The key seems to go part way in, but not enough to turn.   But that may be the situation with any key, wrong or right.  And of course on a bike 35 years old, the ignition might have been changed some time.

[Re-run]

It is sure not uncommon to replace the ignition. Keep with the wd-40 and maybe some good penetrating fluid too.