Steering lock

[3scs]

Would anyone know why my steering stem doesn’t have a hole in it for the steering lock it’s a cb 550k3 which has many parts from an f1 fitted to it but according to cmsn the steering stem is the same for both models

[Bryanj]

Because its not a K3 stem.
The K3 has a lock in the side of the headstock and the pin goes into a slot milled into the srem tube.
Earlier ones fit into the lower yoke and the pin goes upward to lock on the steering stop on frame.

[3scs]

The plot thickens looks like the only part of the bike which is definitely k3 is the frame

[Nurse Julie]

Worry not, the only parts of my original CB550/4 K3 left are the frame, top and bottom yokes and 2 wheel hubs.....she's not called Millie the Mongrel for nothing 😀😀😀😀

[3scs]

Thanks for the kind words Julie Millie the mongrel is a well designed masterpiece but Billie the bitsa is a cobbled together lump in need of a bit of tlc I will get there though 😉

[Bryanj]

If you have the lock hole in the frame you could cut the slot in the stem to take the pin.

[3scs]

That’s the plan