Restoring 1975 DT1 is their anyone that restores Therma Flow hydrolic units thanks Jeff

I ran across these guys on FB market place.  I haven't contacted them since I'm not ready to have any of my thermoflow shocks rebuilt so I can't say if they will or will not be able to help.
Shock rebuilders of FB market place

Thanks for the info and link - I would like to know if anyone has dealt with this company? Being from Canada I could use some feedback if anyone has had a good experience before I send my shocks away.

You should contact them first. Ask if they service Thermal flows. Ask the if they stock parts. Ask what turn around time will be. Ask if they do any external surface prep and will it cost extra. No one on this forum has ever been able to identify exactly what TF shock you have by looking at the numbers / letters on the outside. Recent posts have discovered different size internal components. Info from Yamaha has been minimal. Do your homework before you send them anywhere.

You are right with everything you said, I am a novice here and appreciate any advice but also want to do a proper restoration. Any enduro restorations I have seen in Ontario Canada had aftermarket shocks. TKs shocks were not familiar with the TF shocks.

See if you can contact member Scootern29 with a PM.  He's the Curnutt shock expert and has done other shocks as well.  I'm pretty sure he's done the Thermal Flows.

There was a company that was making parts like shafts but they seem to have disappeared.  That's probably the biggest concern...  the condition of parts like the shafts.  If they are all rusted up, bent, or worn someone would probably have to make new ones.  All of this is possible but would get expensive. 

If shocks look pretty good but just need seals and fresh oil, that's a different story. 

You can use a third party site like Imgur to upload and then link photos here.

Is there anyone selling replacement shafts? 

Leaking seal on one of the Thermal Flow shocks on my Yamaha 250. Drained the fluid. Used a modified hand grinder pin wrench to remove the aluminum cap w/ no problem. Attempted to pull out the piston assembly but no go. Held the top shock eyelet in the vise & tapped down very gently on the shock reservoir w/ a rubber mallet but no success. Can't see a clip or O ring holding it. What is the procedure to remove the shaft & inner assembly f/ the shock absorber body? Thanks for any advice. 

Did you remove reservoir cap to prevent a suction effect? 

The reservoir cap is removed.