I bought a 4-player Hot Rod last week and tested it and it worked. Once i got it home it wasn't working, just flashing "disk or drive fault (seek error)". From digging around a bit this seems to be a common error. I sent a bunch of emails around and have been posting on forums trying to get some help. I'm guessing some of the same folks here have seen this, another thread about the Hot Rod floppy disk and drive http://forums.arcade-museum.com/showthread.php?t=148728
Please let me know if anyone figures this issue out, I can't wait to race. If I figure anything out I'll update it here too