With two 700s and two 750s, the idea was to run one of each and use the others as backup bikes. Early on, the 750 experienced a piston failure (caused by a casting flaw) and blew its engine. The backup bike started a fresh 24-hour run and ended up with the five new records, including the Big One, a 24-hour average speed of 143 mph, blasting the previous year's record set by a Suzuki GSX-R750 at 128 mph. As icing on the cake, the record-setting 750 was then ridden back to California by a Cycle World staffer. Honda had succeeded in winning back some lost credibility by showing, once again, its place as a preeminent engineering company.
Recommended reading.