Format
Biker Build-Off was originally an irregularly-grouped series (termed "rounds") of contests that spanned a calendar year. The original Great Biker Build-Off was a single competition. In 2003, the second round had three contests, and the third round (2004) had six. In 2005, the program was turned into a regular series in which each round would feature a total of 13 contests each. There has also been a World Biker Build-Off special (pitting three international bikers) in 2004.
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