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cb750sc Nighthawk carb accelerator pump

ronxae

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Why is is there an accelerator pump on this carb set ? I don't think earlier versions had this. I was reading about someone in the UK who doesn't have this installed. European version of the bike, I guess. Then I read somewhere that it is supposed to create a faster response when you crank on the throttle hard.
Is the accelerator pump really necessary ?
 
Here it is and consider it a plus. Euro models don't have it because they have richer carb settings because of no EPA. Here we have that and the carbs were leaned out to meet emissions and the resulting lean makes the motors tend to bog sometimes without the pump.

ALL US spec DOHC of these have them..............
 
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