BUDDS CREEK, MD., OCT. 7 -- Mike Kiedrowski held on to a one-point lead in the American Motorcyclist Association Professional Outdoor Motocross Racing tour today by riding his Honda to a dramatic come-from-behind victory in the second heat of the 125cc Pro National Race at International Motocross Park.

Kiedrowski, who entered leading Team Suzuki's Guy Cooper, 425 points to 424, briefly lost his points lead by finishing second to Cooper in the first heat. The two swapped finishing positions in the second race and Kiedrowski was named the day's overall champion by the tiebreaker rule, which emphasizes the final heat.

The cyclists each picked up 47 points (25 for first heat, 22 for second), raising their totals to 472 and 471. There is one race remaining on the circuit, Oct. 14 at Unadilla Valley Sports Center in New Berlin, N.Y.

"I just wanted to be first or second today," said Kiedrowski, the 1989 circuit winner. "My goal every weekend now is to become the overall winner -- that's what I'm shooting for. I'm a little disappointed I didn't take the first" heat.

Cooper, second overall in this event last year, won the first heat, which consisted of 30 minutes of racing plus two laps on the 1.5-mile course. But not without a fight.

After a good start, he maintained the lead for about five minutes before misjudging the track and being thrown over his handle bars coming off a steep hill.

"I was leaning forward trying to go over the hill and all of a sudden my backend caught and just flipped me right over," he said. "I should have been watching the track and not wheeling so much."

Cooper was able to resume racing and stay ahead of Kiedrowski.

In the second heat, Kiedrowski overtook Cooper, passing him on a crowded corner with just under three minutes left in the race.

In the 500cc class, Team Honda's Jeff Stanton was named overall winner after defeating 1989 national champion Jeff Ward in the second heat. Ward won the first heat, with Stanton placing second.