easiest way to find out what the prob is. pull the batt connections. make sure they are clean. even if they are wire brush them a bit and the screws. but cables back on battery. make sure you get the screws decently tight. turn on key listen for fuel pump, try to start. if not, GENTLY tap your relays and try again.
if a no go, hook the charger up to it while it's still in the bike, put it on high, and see if you can bump it over. if so, dead battery. replace battery. (if it doesn't turn over, just as soon as you hit the starter, grab both your positive and neg cables to see if either of them are warm. could have a damaged cable after the wreck. a oddly heated cable is a sure sign to something wrong)
if it worked after cleaning and making sure your screws were tight, you had a bad connection. (fuel pump will kick on even with a bad connection, it will just draw too much current when you try to crank it for a bad connection)
if you replace the battery and it still won't crank, there's more problems, and let us know and we'll help you track it down. start with the basics first.
