| It Reduces The Density Of Air Entering The Carburettor, Thus Leaning The Fuel/air Mixture |
| The volume of air entering the carburettor, thus leaning the fuel/air mixture |
| The volume of air entering the carburettor, thus enriching the fuel/air mixture. |
| The density of air entering the carburettor, thus enriching the fuel/air mixture |
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