Speedfighter 100cc help needed ? thanks?

good morning , recently i purchased a speedfighter 2 100cc 2005 model all was well with the bike untill i had an accident , i came round a corner at 20mph and my wheels locked and smashed and mounted the kurb , now the bike runs fine its just my steering it seems to be leaning to the left , its quite hard keeping it completeley straight, i am not sure how what ive done or how much it will cost to fix, its got a single arm on the wheel ? any ideas
thanks
ed