Bing carb has holes on slide? Why

I have two identical bing carbs for puch maxi. I have been using one to harvest parts for the other and noticed that the two carb slides are different. One has a diagonal hole from the base of the slide, upto the front.... almost as if to let more fuel or fuel/air mixture in.... is it that simple, or have I missed something else why there would be a deliberate hole??

Re: Bing carb has holes on slide? Why

Probably Fred /

Ones a # 24 slide and ones a # 51 slide No biggie

Just use the 24 slide

Re: Bing carb has holes on slide? Why

Pardon? which is which, and is it going to make a difference to the air/fuel flow?

Re: Bing carb has holes on slide? Why

thinking further, the slide with the extra hole will make the mix more lean at idle until you get to wot, right?

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