Yes, if a thorough investigation reveals that the course was set up negligently by the motocross track operator or if course management caused your husband to get injured some other way.
The investigation needs to be thorough because we would need to overcome the legal doctrine that sports and recreational activities, such as motocross racing, involve some degree of risk that is inherent in the activity. However, just because a risk is inherent in the activity doesn’t mean that the establishment was not responsible in causing the accident by the way the course was set up or managed.
Therefore, if you want to explore your husband’s legal options, it is important that you speak to a personal injury lawyer. Feel free to contact me to discuss your husband’s case further so that I can answer your questions and properly assess the case. I would need to know the facts surrounding the accident and whether he signed a waiver of any kind, etc. I would also need to interview any witnesses.