I'm a fan of the event, but not a competitor. I notice many fine U-Tube videos of the best races.
In view of the many rounds of qualifying and semifinals with three men up, there are hundreds of chances every year to break the 100-lap record. There are a few, but not many, 3:00 scores posted.
On the other hand, there is only one 200-lap final at every contest, and thus few chances to break that record.
Thank you for the explanation of the rules change. Does anybody know if the old records were set with retractable undercarriages? I would guess that the answer is no.