I picked up an old D2 last summer. It's about a 1950 model. The seller was able to get the pony going, but it was "finicky". There was rust in the gas tank, and the carb controls had to be "just right" to get it started and keep running. When I got it home, I got the gas tank cleaned and lined, and rebuilt the carb (new float, needle and seat, gaskets, etc.). The weather then turned sour. With the weather warming, I'd like to get back at it. The pony compression is between 60 and 65 pounds (both sides). Is that sufficient, or should I be thinking about trying to "refresh" it (and is that very difficult?). I understand parts can be hard to come by.
Also, the track adjustment nuts are pretty rusty - how difficult might it be to free them up?