Hi everyone I'm new here I have a 87 honda 250 two wheel drive and just for giggles I put a 300 carb on it and it runs great it has great throttle response idles good and runs like a scalded dog until I shift too fourth it acts it's bogging down it ran fine with the original carb on I was just curious any idea waists going on Tia
Emulsion tube is wrong or the jet that sits within it. As said above, you can confirm this by the color or the spark plug
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