Stan,
You forgot Modified or Street, Front or Rear Engined , Roadster or Coupe, or Sport, or Gt, or Lakester, or Classic, or Pickup, or Mini-Pickup, to name a few! (Please take that as a joke, as you no doubt intended.)
Jack and Bo,
Thanks for posting the old records. Interesting that by 1980, all the 500cc and under records were non pushrod except 1 - -and that one by J. (Jess?) Thomas in SAF - 500, still stands today (although I'm not sure about the early Honda records, as they did make some early 90cc pushrod motors). My records in PG would not have been records back then. But I'm still interested in what the early pushrod bikes did pre-1970 or so.
Tom