Also you can win money in private competitions, i.e. 1 offs like the TT and MGP.
Theres about 20 SV650's running in there own V-Twin/Mini-Twin w/e it's called class at the MGP this year prizes do go out. Keep your eyes for the result on friday.
http://www.manxgrandprix.org/
Also quite often Binkey been good enough and getting signed up to a team they will pay your wage to race rather than go off working

. But you have to be good enough first