MOPED ARMY

So if the clone fits well w no leaks then can you gut the real bing and put em in the clone?

Did you change the intake to a aftermarket 15mm intake?

"If the end of the intake that goes into the carb has a rounded edge where it should meet the o ring , it's likely your problem .

Best to flatten that end for a better seal against the o ring"

Here's what it looks like:

it is slightly rounded. this might be it. if this is indeed the problem how would you recommend flattening it.. grinding it? sanding it? replacing it?

"Did you change the intake to a aftermarket 15mm intake?"

It is the correct intake. 15mm. worked with other bings of the same size.

"Anyhow I ended up using the yellow Teflon tape"

I've heard teflon tape and I've heard furnace tape. Can anyone speak to which is better? or maybe a better question is how permanent and reliable of a fix is this? I want to leave the days of air leaks behind me with this ped. (edited)

Any Puch intake will fit a 15mm carb, the outside mounting diameter is the same for the 12,14,and 15mm intake. If it's stamped 15mm ur golden.

The o ring buts up against the sealing surface in the carb. Just get the right size from the hardware store, push it an and apply pressure to it whilst mounting.

Slightly cheaper version: https://www.treatland.tv/MLM-puch-15mm-BING-stock-like-intake-za50-p/mlm-puch-intake-690.htm

But yeah the MLM design with the plastic bushing eliminates the classic bing leak. Plus like Graham said, if you're using a 12mm intake it defeats the purpose of using a 15mm carburetor

What's the diameter of the cylinder intake port?

grandpa 15mm off treats work great for me with an o-ring for insurance. I also use a screwdriver to push the carb onto the intake a bit when tightening the clamp to make sure I'm tight.