By Nanjinia Wamuswa
Muthambi Wanjigi and Maina Wanjigi are brothers who have found niche in motorcycle racing, popularly known as motorcross.
Motorcross is one of the most physically demanding sports in the world and done on rough terrain, steep hills and sharp curves.
Three years ago, the elder siblings Muthambi, 14, started as a joke just after watching international motorcross on television.