Preparing to adjust valves on the Duke … Easy access – you just need to remove the fuel tank. Even the fuel line is made with quick snap on/off connectors, so it’s a five minute job to get to this point. By Jens|2014-01-11T10:20:06+01:00January 11th, 2014|KTM Duke 690| Share This Article FacebookTwitterLinkedInTumblrPinterestVkEmail