OK, I am not in favor of changing the carb. If it is not running right fix it. The bike should run with the stock carb in every condition. An accelerator pump carb is to give more gas and so more horsepower when the throttle is opened. Good for racing but not necessary for the traveler, in fact it could cause problems. The BST carb has a flat slide. It is a daiphram carb. It should work fine otherwise why would KTM have chosen it? I think it is better to get the most out of the stock carb and easier to get spare parts.
Bill.
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