Re: URGENT - Crank Small Gear HELP
There is a woodruff key that can bind up and hold the gear out like this. If it is not fully seated and you run the bike, you could damage the crankshaft severely!
Take the gear all the way off and be sure the key is properly installed in the keyway.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.