Not sure what Puch drive chain to buy. My PuchMaxi has a rusty crunchy sounding stretched chain..
I found ANSI #40 roller chain resembles to Puch roller chain in pitch, roller dia. and width.
The chain offered by McMasterCarr, item nr. 6261K533 is $2.89 per/ft x5 reasonable priced.
I know a new chain made a lot of difference on my bicycle, easier to peddle w/ less resistance and not audible.
Anyone has used this source?