As Cats partner this is my 2p worth, cant comment on the kangaroo jump as its hard to see in my mirrors, but there is definitely a speedo issue. Going up to 55-60 out of southwick Cat reckons she was seeing 60 on the speedo but my 'dero was leaving her for dead. My best estimate was that she was doing 40-45 mph at best. Also her bike stalled before she stopped pulling into the layby the other side of Rode. Engine sounds okay on tickover but I'm no expert so dont take my word for it!