He represented Belgium at the 1976 Summer Olympics in Montreal, Quebec, Canada, where he won silver medal in the 1.000m time trial behind East Germany's Klaus-Jürgen Grünke. Vaarten was a professional from 1979 to 1992.
He represented Belgium at the 1976 Summer Olympics in Montreal, Quebec, Canada, where he secured a silver medal in the 1.000m time trial, finishing behind East Germany's Klaus-Jürgen Grünke. Vaarten was an accomplished professional cyclist from 1979 to 1992.