Stoner troubled by tyre temperature

Casey Stoner admitted his Assen qualifying effort was compromised by worries over tyre temperature following his crash at the start of morning practice. In a bizarre string of incidents, all three works Honda team riders - Stoner, Andrea Dovizioso and Hiroshi Aoyama - had heavy falls within two minutes early in today's practice session, with a lack of tyre temperature in left-handers seemingly the cause

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