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Welcome to the quarter-liter class, no-nonsense machinery. The 2007 MY TT-R230 is a peppy Yamaha dirt bike engineered with a host of YZ-inspired components and aimed at riders who have gotten well ...

To kick off with some Olympic tech, here is Wout van Aert's Cervelo time trial bike from Paris, with a double disc wheel setup that was claimed to be 17 watts faster. Very custom wishbone TT ...