Carb question

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ccain85

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Feb 26, 2017
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I have the Z400 carb with a 147.5 main jet and 30 pilot jet. When I rev it up it pops and high RPMs. When I let off the throttle it idles real low and almost wants to die but then returns to normal after a few seconds. Im at about 3500 ft in elevation.
 
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