I've got an '80 (austrian) Puch moped sitting in the garage next to my '83 R65. Bing carbs all around. The difference in complexity between the 49cc moped carb and the 650 R65 carbs is pretty remarkable. On an order of dozens and dozens of parts.

Ironically, the highly complex R65 Bings have seen 15X the miles that the #^@@(%@ little 14mm moped Bing has seen and given me 15X less trouble and headaches. I can never seem to keep that little bastard vacuum tight, it leaks bodily fluids like a cheap diaper no matter how well it's maintained or adjusted, and generally just runs well when it's in a good mood. I keep threatening to replace it with a little mikuni but never seem to get around to it.