The touch can also be a push, often on the shorts, or one rider hurling the other into the race by a hand-sling.
Teams score points in two ways: lapping the field and sprints.
A total of eleven teams participated in the competition but four of them, India, Uzbekistan, Thailand and Macau failed to finish the race after falling two laps behind.
The Japanese team of Naoki Kojima and Shunsuke Imamura won the gold medal with 24 points ahead of Shin Dong-in and Kim Eu-ro from South Korea, as both teams tied on points the gold medal went to Japan for finishing better in the last sprint.
Artyom Zakharov and Ramis Dinmukhametov from Kazakhstan beat the defending champion from Hong Kong to win the bronze medal by collecting 37 points.