Turkeyfellow91 said:I know it's about forever ago since this thread was going but I am doing a similar build. By similar build I mean straight pipe, 285cc big bore kit, and a 34mm mikuni carb with a k&n air filter my question in what should I jet the carb to. I'm asking here since we practically have the same build. FYI this bike was the one that motivated me to do my xl285 build. By far this is my favorite bike out there