I Have Been Riding Dirt Bikes For About 3 Years Now And I Want To Take It To The Next Level How Do I Do That?

Very simple when you no where to look but a nightmare otherwise!

Go-to both:
Www.jmus.co.uk Find and read the guides on jmus.co.uk guide says road racing but is the exact same principle for Dirt Bikes.

2) Look around on book4bikers.com (Known as Race Book), or just ask a member as lots of them are pro athletes. There is more info about this subject than other site anywhere, including all types of setup information and mechanical info that you just will not find any other place, I no cause I tried for weeks and this was the only place in existence recommended by my friend.

Dont you meen.....

jmus.co.uk

and

http://book4bikers.com

they are both sites made by the same owner who is an actual road racer, and yes aswell as free they are very, very helpful

Some people just sell their old bikes and move up to larger cc ones .
If you want to go to the next level look into what newstyles are out and give it a try

From rider to rider  Motorcross styles  always change .

Go to a local or nearby track and sign up for races. I'm sure that should get you going.

Let's say you have an 80 then go higher in the size of the dirt bike.