I just had about 4500 worth of work done on my 1992 Vigor. One of the major problems was oil leaks 2 in fact. One from the distributor (which I replaced the whole thing) and the major one, the "figure 8" gasket located at the oil filter housing. When this things leaks bad, you can lose all of your oil in a few minutes.

After having all the work done, my 92 vigor runs like it's brand new. My previous Vigor, a 94 lost in an accident (not my fault), was my prode and joy, and I am building my 92 with the same thought.

As far as top speed, I have had my 92 up to 139, and I feel had still some room to go...