I have put the 'correct' NR shifters and a Nitto 'Pearl' stem and bars on, and a recent Brooks Team Pro on an SR LaPrade seatpost. Bars, stem, seat and seatpost had been changed out and Suntour barcons added. Tubing is 531 '3 Main Tubes.' Derailleurs are NR (pat 74), Cranks TA, pedals Atom, brakes Weinmann, hubs Maillard 'red label' Competition with Weinmann clinchers. Here are some pics, 'as found' and current. It would be really neat if the 974 referred to the date, but no way is this that easy! There's a single, obscure letter B or possibly a numeral 6 or 8 on the bottom of the BB shell. (Okay, 'almost certainly' original, take it up with my friend Bill Occam.) SN, as found on the rear non-drive DO: 2993974. My Grand Record is almost certainly 1974 it has the original Pat 74 Campy RD. Hopefully, it will as successful as the other, similar threads (Bianchi, Centurion, Fuji, Miyata, Nishiki, etc.). A summary of the findings will be posted here (i.e. I'll be tabulating and analyzing the data. I need ALL of them, as we don't which which holds the key to dating. NOTE: Motobecane often have several sets of numbers on the bottom bracket shell. Bonus points if you already know the year. Refer to the components page of the Vintage-Trek website if you need a primer on component date codes. Provide as much info as possible on the components including brand, model and date codes (when available). Post pictures of your Motobecane (full drive side and detail pictures of major components, tubing decal, headbadge and serial numbers). It seems Motobecane's format has been giving people fits, so I'm willing to give it a shot, if you want to play along. OK people, I've only got another 500 posts remaining, so I've decided to make an attempt at decrypting one last serial number format.
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December 2022
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