(Adds quotes) HADLEIGH, England, Aug 12 (Reuters) - Czech Jaroslav Kulhavymade a decisive move in the closing stages to claim the Olympicmen's mountain bike title on Sunday after defending championJulien Absalon of France suffered a game-changing earlypuncture. World champion Kulhavy produced an impressive ride on theseven 4.7-kilometre laps on a course overlooking the Thamesestuary in Hadleigh Farm, east of London. ... More...