Hey guys, a little help, and this may be in the wrong forum, so feel free to re-direct me to the right one if you know where this should be, but I've got an xr600, so this is where I'll start! I've got two races coming up, the 49er next weekend and then the Prairie City HS the following weekend. What I'm wondering is, if I get some race gas for the races, how do I adjust the carb for it? I used it once before and didn't change anything with the carb and it ran like CRAP!!! Then I read somewhere on here, but couldn't dig it, up that the carb needs to be set differently to accomodate it, any suggestions? Do I need to jet it differently, or can I just lean/richen the mix? Also, is it worth the $6/gallon for a power increase? Any help you guy scould give would be great. Thanks.