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About milkobike

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  1. Thanks, will get some mains and try on the weekend. It's still running the stock 172 mainjet.
  2. I've got an 03 wrf250 and have just put a Staintune muffler on it. I have adjusted the fuel screw and raised the needle one clip to remove the flatspot at 1/2 to 3/4 throttle. The bottom end is vastly improved but I still have a flatspot at about 2/3 throttle. How do I know if it is too lean or too rich? If anyone can help I'd be grateful.