Do I need to prove the accident wasn’t my fault to make a motorcycle injury claim?

Yes, as with any road traffic accident claim, you, as the injured party, will need to show that someone else’s negligence caused the accident, if you want to bring a claim against whoever was at fault. The cause of the accident might be negligence on the part of another motorist, or fault may even lie with a local authority (e.g. in the case of a pothole accident).