It took me about 45 minutes, did the slide mod, air-screw, needle, main-jet, removed the snorkel and the air-box side. It is actually ridable now, what a HUGE difference, now I need to get exhaust and remove the 20lb OEM muffler. I know why the original owner never road it, because it was un-ridable in stock condition. It has now 845 miles on it, I am not sure when they went to a 'fixed-needle' but I think it was in the mid 90's or so. I guess it was the EPA/CARB requirements???