I bought this moped up while I was in the UK in 2009-2011. Over the course of a few years I gradually sourced new old stock parts from leboncoin, french Ebay and Marc at lesolex. NOS parts included: fuel tank, forks and seat. The frame and tank were powder-coated gloss black back in 2012. The dual-variated transmission is driven by a 70CC AV10 motor with PHBG carb and le partie CDI. The exhaust is an old Ninja G3 which was formerly fitted on the People's Champ of Creature fame (way back). The completed build won Best Top Tank and Best In Show at the 2015 Moped GP, largely because I also took it out on the track for some hot laps :)
This particular model was designed by Motobecane to compete with the small motorcycles flooding the European market from Japan in the late 60s. I believe it is the longest frame of any of the mopeds Motobecane built. That. combined with the motorcycle style front suspension, and overall weight, make for an extremely smooth ride. The current tuning allows the bike to hit the low 50s easily and hills are no problem with the dual variated relay box.
Thanks to Fred, I think there are a few of these floating around these days in the US. For sure none as beautiful or high performing though. Not pictured, but included in sale: second set of forks with all the spares sourced from Brian in Bristol for a complete rebuild, unpainted side covers which might be original or maybe hand built by some French farmer in the 70s.
Asking: $1200 - I can bring this to the Puddle Cutter Rally this weekend if needed.