The biggest thing I saw from both is not moving body's around and using the brakes. Leave the brakes alone, at least the back brake anyway. That 650 has a ton of engine braking. Get in a lower gear and rev that bitch out in the curves and then you can use the engine as your rear brake when you feel you need to instead of the brakes themselves and standing it up or sliding out. When in doubt lean harder and have faith it will stick. If it doesn't, well you leaned harder so you're that much closer to the ground if you do go down you don't have as far to fall .