Complex sentence: Double reigning world road race champion Van Looy made his Tour debut in 1962; he had avoided riding the Tour because he thought he did not have the full support of Belgium team, but with Flandria had control over rider selection.
Split into simpler sentences: Double reigning world road race champion Van Looy made his Tour debut in 1962. He had avoided riding the Tour because he thought he did not have the full support of the Belgium team, but with Flandria he had control over rider selection.