If you are wearing a helmet at the time of the motorcycle accident you can sue the person that caused the crash for all of your injuries.
However, if you don't wear a helmet, Florida's Helmet Law may reduce the recovery. In Florida, if you're over the age of 21 and have a minimum of $10,000 of medical insurance, then the operator of the motorcycle is not required to wear a helmet. §316.211, Fla. Stat. If you are under the age of 21, you must wear a helmet at all times.
If you are in a motorcycle accident and you are not wearing a helmet, the at fault driver and their insurance company will attempt to blame some or all of your injuries on your own negligence for not wearing a helmet. This is commonly referred to as comparative negligence. The reality is many motorcycle drivers do not like to wear a helmet because it may not be as enjoyable of a ride. While that may be true, it gives the defense a reason to not accept responsibility for some or all of your injuries caused by a motorcycle accident.