I hit someone with motorcycle. now she is making me pay more than her injuries.. what should I do?

If it's an order issued by the court that held your case, you cannot do anything but pay the damages awarded.

Just because you've been instructed to pay for more than what her hospital bill cost does not mean you've been wronged; There's several things to take into consideration like the charges pressed upon you, and the emotional trauma you've very likely given this woman, that convinced the judge and jury to punish you extensively in order to ensure that you do not make this mistake again.

If you are willingly giving this out of pocket, and not settled in a court, you're better off going to court and accepting the set amount to be awarded to her unless you can prove that she is at fault.

Good luck.