Fuel Pump for small engine.?

So i am getting a rm 80cc (1978) motor for my go kart. I am lost on how to receive fuel to the motor because i cant put the gas tank above the motor. So I looked into Go kart fuel pumps but i am not sure if i hold a "vacuum impulse from the crankcase" What ever that money. So can you help me by relating me if i have a " vacuum quirk from the crankcase" or another solution.
Please help me.

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Answers:    Yes this engine would enjoy a type of a vacuum pulse.

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