Can I buy a motorcycle without my parents consent?

I REALLY want a nice bike, like a Suzuki GSX-R600, but my dad gets angry and my mom almost starts to cry and basically say there's no way in hell I'm getting one. I'm 19, live at home, have money in the bank, and a steady income. I know it would piss them off greatly, but it's my life, and I should be able to ride a motorcycle if I want right? Can I pay for everything myself and not feel guilty? It's really a sore subject, I've tried to gain their approval before but it just fails miserably every time. What can I do?? I'm sick of this issue, and I really want to ride!