Sorry this is not a Penton question but Some of the guys here may have my answer.
My Puch 175 Enduro bogs from idle to 1/4 open. What should I check on the Bing carb.
This is a later model motor with the bigger carb. The bike flys 1/4 to full
throttle.
If I remember reading in Dirt Bike back in the day there were some carb problems
with these bikes.
The bike has an after market pipe.
Replace the needle jet as it is apt to be ovalized and make sure the slide does not have a smiley face. If so replace it too. My bet is that it is one or both.
Larry P