Paris's nationalist motorcycle sharing system, Velib, is losing much than 600 bicycles per week to joyousness riders, threatening to overwhelm the strategy and leaving users frustrated, its relation said Thursday. "At the moment, we're missing 3,000 bikes" retired of the fleet of immoderate 20,000 regular and electrical bicycles, said Sylvain Raifaud, caput of the Agemob institution that presently operates the Velib system.