From FSA. I wrot ethem about wanting their product for my commuter bike:
ETA for the 170mm Mega Exo type Omega 46/30t cranks has been set at 4/24/2017. Which means they will be available for sale about 4-5 business days after. Use the below part # to place an order for a set around that time via most bike shops. You will what to find out what bottom bracket standard Motobecane used. The below Omegas fit and come with an BSA (English) threaded bottom bracket.
330-0158BJ3261 Omega Adventure ME 46x30 N10/11 170mm SB black V17 w/o BB,CK-4002ST/WT $ 156.99 retail.