- Joined
- Jun 30, 2012
- Messages
- 14,890
There is a difference between a race motor and a road motor. The Jawa speedway motors are also race motors. My friend helped Ron Miles get into road racing, but Ron died very quickly when he got to Europe. In those days the Australian Nortons had Symco conrods and were able to rev reliably to 8000 RPM. I had friends who were into that garbage in the early 1960s - the costs were horrendous. A piston was 30 pounds, and a sodium cooled exhaust valve was 15 pounds. I don't know where they got the money. An ES2 probably has a fragile bottom end.