* Zika is no concern, says chief * Cycling test event on June 25-26 (Updating with cycling test event dates) By Karolos Grohmann LAUSANNE, Switzerland, June 2 (Reuters) - The Olympic velodrome will be ready for athletes to train there this month, organisers said on Thursday, with the most delayed project of the Games still to be completed two months before the start. Games chief Carlos Nuzman played down any impact from the political crisis in Brazil, with the impeachment of suspended President Dilma Rousseff and her trial scheduled to run during the Olympics. More...