Alright, so I bought Roald's old k-star kit.
According to him:
"70cc K-star. New piston-ring (40 miles old) with reserve piston-ring (new). Modified exhaustport (67% of the bore and 1mm higher) and modified piston (1mm shortened and booster-ports dremeled. Booster-ports don’t look too fancy)"
So, what should I expect to have to do when I try to mount this sucker up? I searched for more k-star info on here and it looks like mixed reviews. Is there much to do for case matching? I don't want to have to work too hard for this one. haha