Why are my jets so small in polani d slide carb?

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Evan Pickens

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Hey everyone a few carby questions for yall. So I'm building a yx 140 motor. Decided to get the 26mm polani d slide carb. But the jetting that comes with it starts at like 105 and goes to 130ish. All other 26mm mikunis and oko style carbs jetting is like 190 ish stock. Why is the polani 26mm jetting so much smaller for the same mm? Are d slides just that much more efficient? Kinda a newbie to carbs
 
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