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Model Citizen
Join Date: May 2007
Location: The Voodoo Lounge
Posts: 19,322
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Alright. Looking at that drivetrain, I wouldn't be surprised if it's a combination of 2 things. Chain stretch, front cog wear. And if it's not getting into your smaller gears (bigger cogs) than there is some chain stretch, too. So,for the chain jumping off, adjusting the B screw in a little bit (wind it in clockwise) will probably snug the chain up again. It looks like it's in good shape other than just getting used (good for you on that! Bikes should be used!).
If you're not getting into your smaller gears (big cogs) unwind the cable adjuster counteclockwise until it goes in easily. You might have to adjust the cable 1/4 turn one way or another after you pull the stretch out of it.
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"I would be a tone-deaf heathen if I didn't call the engine astounding. If it had been invented solely to make noise, there would be shrines to it in Rome"
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