The hole where the filtered air actually goes to the carburetor is MUCH smaller than the stock Sachs filter. My ped ran like straight garbage with this filter, wouldn't accelerate over 15mph. I put the old 40 yr old Sachs branded filter back on and back in business ripping 35mph. I'm sure you could drill out the rubber and make it work, but why should you have to? These may be stock on some restricted models, but not the 35 mph versions.
edit treats : this one is the filter most use and I haven't heard of people have the problem you are having, but if you want one with higher flow just grab https://www.treatland.tv/HIGH-FLOW-sachs-air-filter-27mm-ID-p/high-flow-sachs-air-filter.htm easy!
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Nice Filter, Perfect Fit!
January 27, 2017
taco eater :
Alan Blake from Cleveland, OH United States
Filter fit perfectly and sealed up nice on my wife's Sachs G3.
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yes
October 1, 2014
taco eater :
ah.....guy from Orange, MA United States
yes now i can stop useing my dryer sheats as air filters but sadness it will not smell so downny fresh :(
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Sachs 5051/d
April 3, 2014
taco eater :
C Geigle from oakland, CA United States
Perfect
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Yup
February 21, 2014
taco eater :
Seth Mattingly from Belleville, IL United States
Pretty damn good, you bastards got them in stock like 2 days after I ordered too :P
Too restrictive! 
Nice Filter, Perfect Fit! 
yes