Hopefully, I won't get heat for these questions.

I just started playing GTA V online (ps3).  Mostly because I don't like online gaming (sin, right?). 

So, I got enough $$$ to buy my first bike, Bati 801.  I have not modded it in any way.  I've been watching stunting videos online and have been trying to get at least a bump, but seriously can't.  If I go at extremely slow speeds, I can usually get a small bump, but if I get speed, and try, I end up either dying, or watching my bike super launch through the air.  Once in maybe 100 tries (give or take) I might get a nice bump, but can't glide worth crap.

I don't understand what I'm doing wrong.  Like I said, if I drive slow, then I get a bump, but at decent speed, I crash and die or lose a lot of health.  I have started my wheelie early and last minute, and nothing helps. 

I realize that I'm not going to be great at stunting the first time I try, but it gets frustrating when you can't even begin stunting.  I play for about 30-40 minutes, and because I can't bump, I usually turn the game off. 

Do I need to mod my bike?  And I heard you need to gain strength.  Is this true. 

Sorry for asking this question.  Please don't hate on me.  Just trying to learn something cool. 

TIA,

watchdog