Please buy a good helmet as well as whatever else you can afford. (flame proof suit, socks, shoes, gloves, arm restraints etc etc) You may only need to use it once....but you want it to work when you do have to use it...
I had a relatively soft crash last year...if you can call it that...Peter Tryce a fellow BDR owner in the states did also.....but not as soft as mine.
Cobra Crash Willow Springs, Short version 130 mph - YouTube
Take care....