72 CR 400 Questions

Bought this awile back and just got it home. Numbers say 72 CR 400 with some obvious mods. Questions.
1. Shock relocate was very nicely done, Fox kit with the shocks or something else?
2. Were these reed valve engines, it has reed manifold.
3. Front forks are later, like the two 76 carcases next to it.
4. Swingarm?
5. Motoplat?
6. Shouldered wheels, hubs?

I have tried to buy this bike for a long time and he finally relented but it has sat for along time. Tank is pretty good and on my shelf. My dad had a 72 CR 400 new so, this will be a long term resto/rider and look forward to everyones input-opinions.

Daylight pics.

Here's some better pics. Looked things over better in the daylight, looks like the shock relocate was done very nice. Front forks, later black leg ones also have a Fox Forx decal on them and air caps.

Great......

Engine had no numbers on it and I'm not the pre-evo guy. Frame serial number make bike a 72 CR 400. Pulled barrel off and piston looks awful small, stamped 69mm, dang it! Haven't found a spec. yet but I dont think the small bore would be a 400, maybe a 250?

I was going to reply earlier on this, but had to get my account set up, I guess talk of CR400s pulled me out of lurking status. Anyways shouldered rims were the stock set-up, and from personal experience they are not much fun to deal with when pulling really old hard tires off. The stock piston size for it would be 81.92mm, 69ish mm is correct for a 250. They were not reed valve motors, but they do pull like crazy. The little bit of riding I got to do one mine before it grenaded itself (I failed to fully go through the motor and the last owned didn't put a base gasket on it) left me very impressed with the power. Mine also has a Motoplat ignition system. I hope that helps answer some of your questions.

Found engine number and verified its a 250. It has a DH reed/manifold on it. Found a 400 engine for it so I have "options" as the frame mods wont make a correct resto anyway. Thanks for the info and welcome to the forum. I'm making my own case installers and would be happy to post pics when I get them done, in response to your other post!

Old tires-lube razor knife with diesel then bolt cutters. Less cussing or more if it helps in some way!