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               Originally Posted by 
              Kev  
              Most of the XT's weight is in the motor.
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         Somewhere around 55kg for the motor on it's own, so definitely 'solidly built', but there's plenty of weight in the chassis as well.
         
        
 I have a stupid idea for building a much lighter bike around the XT motor, but I'm trying not to even think about it till after I get back from the US.