I am not even sure whether mine is uncorked or not; I hope it's not because the performance are a disappointment, the beemer ('97 F650 was almost better). All I know is that the baffle is missing and that the bike is sputtering and stalling a lot (less when hot). I am the 3rd owner and the guy who sold it to me knew nothing. A couple of questions: 1) How do I check whether it is uncorked or not? 2) Is there any comprehensive guide on what to do? 3) Is it normal a max speed of 85/90mph? Thanks G.