I bought a mountain bike for my daughter at a yard sale recently. It's not a high-end bike (a Huffy, but probably the walmart or academy sports variety), but it was very cheap (under $20) and effectively brand new... one of those "we bought her a bike but she never rode it and now it's too small for her" sort of things.
Anyway. The problem is, it's a 15-speed (3 in front, 5 in back) and the shifters are really strange, especially the right side. Its a simple thumb shifter with a single lever. The marks indicate 5 speeds but it's out of tune I think since it doesn't shift anywhere near where the marks are, and she has to sort of play with it to get it to shift. Basically push it up until it shifts, then dial it back down so the derailleur won't rub (that's actually more a problem on the front than the back, of course).
My question is, though - where can I get a 5-speed shifter? I haven't been able to find any other than some old ones on ebay. I have a hunch that the shifter is REALLY a 10-speed shifter with a sticker on it that says it's a 5-speed one. I'm not looking to spend a lot of money on this, it's not a good enough bike and since it's a 24" she'll outgrow it in a couple years, but since this is her first mountian bike, I don't want to turn her off of it because the shifter is squirrelly.