I use an inch wide woven polymer tank strap with an adjustable buckle up towards the front mount which loops though a thick wire attachment behind the steering heads, and at the back where I've fitted a attachment to the cross mount which goes around the bar with a hook that holds one end of an offcentre latch (such as is used on military ammunition boxes). When you hook the end of the flexible strap and latch to the rear hook, and close the latch, it stands vertical at the rear of the tank, the strap is stretched quite as bit according to how you have the buckle at the front adjusted. The latch comes with a hole through it so it does not pop undone easily if it is locked, I thread about a 2 inch piece of lockwire through the hole with the ends bent ( not twisted together) so it cannot pop undone while you are riding the bike, however if the bike catches on fire you simply pull out the wire and flip the catch , push aside the strap and pull the tank off. The reason for all this is quite simple. If you ride the bike too hard in a high speed corner and push the front wheel out from under you, you can experience the great big tank-slapper. Successful recovery often involves letting go of the handle bars and grabbing the tank. If it comes off, you are off the bike.
When I race the tank is always locked down hard onto the rubbers, yet still easy to get off. The worst example of this going wrong was the crash which ended Peter Williams racing career where both the tank and the seat he was sitting on came off the bike in a difficult situation.
Don't use friction steering dampers - only hydraulic - helps a lot. And if you get in the shit keep throwing the bike vertical and don't grab the bars too soon.
I'm not a good rider however I know how to avoid getting hurt. If you get into the worst situation and the tank comes off, you are stuffed - you need to keep throwing the bike vertical using the tank to do it.
