Hey guys, I was speaking with a dealer about the WR450F and he said, like the sticker says, that its not designed for highway use... fair enough, and he also said that you shouldn't ride it at constant high speed or high RPM. My question is, what is the worst case scenario should one keep the bike at a high RPM and what is the maximum speed do you think one could get away with if they were to sit on it constantly for 20 mins or so? Apparently the engine is designed to vary in revs heaps, but what would/could be the problem if we revved them constantly? Has anyone taken them for a constant high speed burst and had any drama's or has anyone had any problems with this? Cheers guys, Thanks Daz.