For tought supercross whoops make sure you have a good suspensions setup for sure. From the top down in supspension settings I'm running 35, 50, 40, 35. Keeps the rear tire hooking up and the front is plush yet gets traction. Basically, setup for the whoops. Come in slow and make sure that your front tire hits every whoop. Missing a whoop means crashing for sure. Also, make tiny direction changes. Major changes in your direction will make you crash every time for sure.
Just..go straight..And if you're like halfways through them and it starts fucking, hold the rear brake, dont let the gas go..It straightens the bike up a little bit and makes it easier, you wont be able to go that fast but it helps abit if you're about to screw up..