Dont have to worrie about jets F*&ked up the 250 bad

On easter sunday me and my buddy went ridding I was on my 250x he was on a 400ex. Well my chain keep coming off when we were ramping and messing around I didnt think anything of it. So he let me ride his quad and he rode mine we were racing down the road when the chain snapped on mine I thought no big deal just lost a link. I stopped and looked at it and after it broke a link got jammed sideways in between the drive sprocket and side cover putting a big hole in it. And now it is leaking oil around the drive sprocket shaft any on got repair maual pages telling how to tear the lef side of the motor so i can see what damage I caused. Thanks