Here are KTM’s specifications for the 2013 Duke 4 R model:

and the D4 ‘standard’

source: http://www.ktm.com/za/naked-bike/690-duke-eu/technical-details.html
These are the official KTM specifications for the Duke 4 – 2012.

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Here are KTM’s specifications for the 2013 Duke 4 R model:
and the D4 ‘standard’
These are the official KTM specifications for the Duke 4 – 2012.