Okay,
1st. Don't think its an easy job cause it looks like a VW
2nd. don't forget to over look the manual and then get a Limey to translate the English into Colonial speak.
If you can make sure that steering wheel is straight with wheels dead ahead before removing, if you have nice straight shot into work area it will be easier to have spokes centered where you want them when going straight with new wheel on.
Remove Bakelite clam shell cover bottom first + screws then the 1/2 clamp which holds upper to steer col. Look to see if the pointed sheet metal screw in middle has nicked wires for turn signal that pass thru same spot e tape or cover. Take that screw and throw into yard as far as possible.
Okay now the fun Prise means gently pry the center horn button "the leatherette chinga with the silver center, pry between the chrome ring and the bakelite holder that turns to free up the expander bolt. The manual says turn to the left I think then pull to extend wheel to most outward position.
Now IDK if this is required but some tech writer pecked it in there. With the center padded horn button off a 1/2 bolt will come off next. gently then wiggle off the bakelite ring. Here is where I think I screwed up. If you turned the release more than a couple of turns a collar which is just below the horn ring end looks like (_) " put a line on top too" if the collar is screwed out too far it looses its threaded grip and away slides the expander bolt with a ball bearing rolling down a hollow tube sound. "this is where the collar like nylon washer in the picture hopefully still is and will prevent the escape of the expander bolt. You can't see this yet I do not think, mine was long gone.
Okay take off the 3 screws holding off the horn ring, oh and battery disconnect if your horns work good, mine are anemic and needed the work out as they sound better now, but the dog hated it.
Hopefully the collar,"a cast piece that the 1/2 bolt goes into is still screwed into the end of the expander bolt. Again here is where I err ed turning the bakelight wheel too many times will also disconnect the collar then if no white nylon washer on expander bolt shaft is present gravity takes over.
I made a replacement out of a thin plastic about the size of a nickel. Just to safe also used light fishing line got a clove hitch to the threaded section.
Fool me once you little bastard car, okay but not twice!
Now you can take a socket I only had 26mm to remove hold down nut.
Now gently rock side to side to remove wheel keeping eye on nylon washer and safety string if used. The nylon washer covers the big nut that's why I used the string fed thru the socket drive.
With wheel off and a hypo syringe and a Wd40 straw you can give a little oil squirt to the bearings per drawing in manual.
Fit your sexy Moto Lita, It wont have a horn ring but you will need to thread the button contact to the Lucar "Translated push on connecter."
Put on 26 mm nut
You will not use collar so you will need a 1/2 head nut to secure the expander bolt and tighten down where it's most comfortable as your adjustment feature is no longer available. maybe you need a couple of washers. Press in your new horn button.
I hope I was clear enough.
Cheers W.