No - the new Bonnevilles are quite stable - the frame is entirley different form the original. Don;t be fooled by the classic look - there is 21st century technology in there (though maybe not as much as is in a CBR!) I´ve never ridden a Thruxton, they look a bit uncomfortable. The new T100 which has the same 865cc engine as the Truxton can be tuned to add ten HP or so quite easily with a set of after market exhausts and new carburattor jets.