[Kevin Sevcik]

Frankly, it would only work if you only need to turn the motor half a revolution. Gears are meant to be constantly meshed, so expecting it to survive whipping around to re-engage... well it's not going to happen.

This goes for sprockets and chains as well, which is what I suspect you're actually talking about.

In either case, if missing a sprocket or two is what's holding you up, post it as something you need in the CD marketplace and/or in this thread. Many teams have extra sprockets laying about and would probably be willing to give you a few.