good on you twist,,these engines have a pretty short stroke,and therefore a pretty slow piston speed,they seem like your revving the gizzards out of them but its not as harsh as some might think on the engines,so long as you replace the oil sooner than specified and have a tinker after a hard ride like that itll just keep on doing it,i dont like the feeling of sitting on 80 in a straight line for long though,its not comfortable for me on these after a short while,i just use cotton wool in my ears on longer runs,i find the proper ear plugs give me an odd not quite with it,too cut off feeling?,the main thing is you did it and enjoyed every second of it,,you wouldnt have had as much fun if you just bought a new bike and rode it like that,,like stevo said i get a rear hop going too hard through rougher corners even with ikon rears,just ride accordingly.