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Good about the reflective jacket.
About the shifter, there may be set screws that are restricting the range of the chain. They are meant to do that, to stop the chain from jamming, but if they are set wrong they can stop you from going into the inner and outer gears. Or the cage may need to be straightened.
I'm partial to LED lights personally.
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My bike runs on dihydrogen monoxide. 
I like to use these acronyms
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