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Carb Change Over

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Has anyone out there had any experience changeing to a bigger size carb? The air mixture screw on my 2004 300MXC froze up. It is a 36mm keihin. I found a 38mm Keihin from a 2003 250SX. Altitude 6,000 to 7,000 feet.

38mm 36mm

main 178 main 160

pilot 50 pilot 35

needle N3CH needle N3EH

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