Converted my Motobecane Grand Jubile to fixed gear last night.
I had been having issues with the Huret Jubile drivetrain, and it looked like the best solution would involve throwing money at it, which is in short supply right now. I still wanted to ride it, though, and coincidentally I hated how my other fixed gear looked with super gaudy gold anodized deep-v wheels I am borrowing from a buddy, so I figured I would kill two birds with one stone and just convert the Motobecane.
Re-dished the rear wheel, stole the cog, chain, and crankset from the ugly fixed gear, and here we are.
I still need to do some tweaking like installing a 5mm shorter spindle so that I can get the chainring on the outside of the crank, but it's quiet and the chain doesn't show any indications of wanting to jump off. I'd also like to put a 42 or 44 tooth chainring on, but my current 1/8" chain is just barely long enough for the 40x16 I have on it now.