Great Britain's Neil Fachie and Barney Storey won Paralympic gold in the tandem blind and visually impaired one-kilometre time-trial in another eventful session for the hosts at the London 2012 velodrome.
Fachie, who is partially sighted, and pilot Storey clocked a world record of one minute 01.351 seconds to win ahead of Spain's Jose Enrique Porto and Jose Antonio Villanueva (1min 02.707secs) and Holland's Rinne Oost and Patrick Bos (1:03.052), who took silver and bronze, respectively.
Ireland's James Brown and Damien Shaw finished ninth in 1:07.979.
World champions Anthony Kappes and his pilot Craig MacLean were scheduled to begin last, but two mechanical problems meant they could not contest the race.
Jody Cundy experienced similar trouble at the start gate on day two and was denied a restart, resulting in an expletive-laden reaction. The 33-year-old from Wisbech was back on the track on day three and qualified in third place for the men's C4 four-kilometres individual pursuit.
Cundy clocked a personal best of 4:42.005 after ensuring he started smoothly and will race Diego Duenas (4:50.016) in the battle for bronze.
The Briton added: "I was so ready for the race I was about to do and because of yesterday I gently eased myself out of the gate, let it open and just rolled away. I had that first pedal rev and I thought I can go now.
"I wanted to make a medal final, to narrowly miss the gold medal final that's a bit gutting. But I've got to treat this bronze final like I would have treated the kilo yesterday."
Jon-Allan Butterworth reached the gold medal final of the C5 4km individual pursuit.
The 26-year-old from Sutton Coldfield, who lost his left arm while serving with the RAF in Iraq in 2007, set a new world record of 4:35.026, but there were still four riders to come in qualification. Australia's Michael Gallagher then beat the mark, clocking 4:30.012, to take his place against the Briton in the final.