100cc carbs

Does anyone know about carbs for 100cc air cooled engines. am looking into getting a 29mm slide carb to replace my 24mm butterfly that i currently have. It is for my vintage kart running a rotax dsc. Do they increase power across the whole rev range or just up high and is any tuning required on the engine side to utilize the bigger carb?

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The larger 29mm FSA slide carbs will actually boost the mid, quite a lot. Slides are more difficult to tune of course and you give up some partial throttle response.