Last fall I purchased a late 70's Mobobecane three-speed, wiith a step through frame and matching fenders. It had been sitting in a suburban garage for 20 years and cost me $50. I got it turned up and put new tires and a new seat on it, plus a frnt basket.
I then proceeded to ride it through the winter. The bottom bracket and cottered cranks are now pretty much done for. I recently got them tightened and they only lasted about 2 weeks before becoming completely loose.
My bike shop said that they could put a universal bottom bracket in there and a modern crankset...but this would be kind of pricey.
At this point, I'm wondering if I should cannibalize the parts that I put into this onto a different frame, or if I should just put the money out for the bike. I like it, but I wouldn't say that I'm in love with the bike, but I do like the step through frame and have had difficulty finding women's frames that are tall enough for me.
What should I take into consideratio when making this decision?