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Crf250r hard to start and sputters

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Hi all. I have a 2005 crf250r that’s being hard to start and sputters at mid range when riding it. Jets are 162 main 45 pilot and the rest are stock. Fuel screw is at 2 3/4 turns out. Has fmf megabomb header and factory 4.1 exhaust. Just had top and bottom end rebuild and has about 1.5 hours on it now. Valves are in spec tho one of the intake valves is a little bit tight. Sometimes the bike will idle and sometimes it won’t. Other than these issues it has tons of compression and power. Any help would be greatly appreciated




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