I recently purchased a 1997 Rebel 250 that ran great and is very clean. After only a handful of rides it wouldn't start and has no power when I turn on the ignition (no lights or any auxiliary power). I have tested the battery and it is good, the ground off the battery is good, and my fuses are good. I was able to push start it once and it ran poorly but I wasn't able to get it to idle on a second push start. I had an old truck with a similar problem that turned out to be a bad ground connection but I only know of the one ground on this bike, any ideas or suggestions are helpful.