What everyone else has said.
The biggest variable with the setup will be you. Rather than searching what you can change on the bike to make it fit you, do some reading and research and then apply the knowledge to make you fit the bike.
There are pages upon pages regarding technique so no point going over it again.
Remember, once the bike is in motion, the rider should be too. The ground exerts forces on the chassis, some is absorbed by the suspension, some will need to be by the rider. Your joints make great secondary shocks.
Instead of fighting and holding on to the bike and trying to wrangle it, learn to control it. Clutch, throttle, brakes and body position. They are all variables which will change the way the chassis moves and handles and the forces will be passed onto the rider so the way you move has to be as variable as the rest, and work to offset the forces.
When you're doing it right you won't feel like you're hanging off the back of the bike as it comes on song. You'll be wicking it up, leaning forward and letting the bike 'push you' forward with it. It all takes time, and all takes practice.
Start slow, let the muscles build, learn the right skills from the get go, avoid bad habbits, and enjoy the experience.
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