that seems to be a common problem on a lot of banshees ive seen.........
maybe try welding it or sumthing? make it stronger, i dunno, that happened to like 3 Banshees at the Flat track races i was in......
If that happend when you fell off from that wheelie....that's sad dude. I've flipped my EX hard at a MX track, had it on it's side more than once, and never had a major problem like that. Ride Red Bro!!!
It came over on it's side, and must've hit on the top of the wheel.. thus bendin it like that.
I dunno though, it might've already been bent a little, I've been havin a little trouble with the steering since I got it. I've only flipped it one other time.
It's $120 for a new one, but I guess I could have my uncle weld it... think that's a bad idea?
Sometimes the bike hits wrong and you can't explain why things bend sometimes and not other times. I rolled my old '92 LT250R about 10 times over on a hillclimb. The only thing that bent was a small piece of flat steel that goes between the tie rod and the spindle. Another guy I ride with flopped his bike over trying to cross a downed tree on an angle. The bike came up and over landing on it's top and the dirt was seemingly soft. When we righted his bike we found the the steering stem bent at the clamp plate. To watch these 2 wrecks you'd swear that my bike should've been totaled but somehow it survived relatively unharmed.
I wouldn't sweat it dude. Check ebay for an upper a-arm. When you heat it to straighten it you risk weakening the metal which will make it prone to bending again on an even easier hit. You'd be better off just replacing it.