77 WR250 back from the dead

No lube needed because they are teflon lined.
I guess you could take the off the old one and use it as a dummy for looks.
I think it's held on just with a staple.

The WR models usually had a longer front brake cable to clear the speedo and headlight. If you are not using either one, then it really doesn't matter. Just make sure it's routed correctly.

My bike had a Preston Petty light that was crumbling to the touch so that got jukned and it does have the VDO/H speedo but the wheel unit is missing parts so I most likely won't be putting it back.

i might have a drive

You might want to be specific as to what's missing. The pins you can get from a bolt shop, the washer is fairly easy to source, the drive unit is more expensive and harder to come by (unless, of course, Troy Deck has it for you).

I haven't taken the hub unit off yet but right off the bat I see the pinion gear that mates to the square speedometer drive cable is missing. I don't know if there are different ratio versions. This one says 32/8/1 1:19= 8/75.

I can't find it in the 76-78 WR spare parts catalog but starting from '78 and up to mid-80's, the VDO gear used is Husqvarna part no. 15 17 302-01.
And I think the last digits "8/75" is date of manufacture because on my '81 WR it has same as yours "32/8/1 1:19=" but ends with "8 80".
Also I have some NOS ones that end with "11 86". Some pics so you can compare.

So they made them the same for a long time. Can you take a pic of the pinion/worm gear?

The unit seems to be pressed together so I can't get it open to expose the gear.
Peeking down the hole it looks like this. The brass piece sits about 22 mm deep in.

And the other end,

Hope this helps.

Looking at one of my old ones, the "plug" in the end of the pinion hole is staked over. Removing this plug may enable you to extract the insides. The pinion is most likely stopping the large gear from coming out. I've not tried it as new ones are available and not too expensive.

where are they available new?

See PM Rich.

I took off the old shocks to evaluate their condition.
Does anyone know if the small springs on the stock shocks are the same red as the fuel tank?
It looks like it.

I was looking at some pics of my 76 250WR when it was new and the shock springs were all black.

It was produced over 40 years ago, nobody is going to say "not stock" if the springs match the tank. A little bit of well-executed stylistic creativity will be appreciated (at-least if you get the 'right' red on things. You don't want to stand out as the only bike that's 3 shades to dark/light or just plain 'off').

I once owned a new 77 390 and can't remember the color of the shocks' smaller springs however I did refurbish those shocks a couple years back and chose chevy orange for the small spring color. Not sure if I did this because it looked like the original color or because that was the only paint I had in the cabinet.

I remember why I painted my shock springs chevy orange. The color of the short spring indicates the spring weight. The attached pdf shows a spring rate chart for Huskys. You can get an idea of the color by measuring the coil diameter or in the case of a square coil measure the cross section, plus the number of coils.

That chart is awesome.
However mine are slightly different. Yes 40 years have passed and I don't know what may have been done in that time.
I'll look at the parts list and see if I can find what's called out.
I took some measurements and the long spring is 222mm long with 7.5mm round wire, black with no stripe, 13 coils.
I don't know where they measure coils.
Short spring is 70.9mm long with 5.6mm square wire, 6 coils, red color.

Pictures can help us determine what your working with.