Ive got an 01 DS650 Baja.... Im pretty new to Quads so forgive me if i seem naive.
When the quad is running in a straight line it feels almost like its pulling to one side... and if i corner hard right... then the front left sinks real low... but it dosent do it the other way. and can feel quite unstable... and yes... the tyre pressures are the same.. Ive adjusted the steering to no avail... and the front shock settings seem similar... Any idea's? Thanks!

 

There are many many things that will cause this.

The first thing I would do is give it a real good wash job and then look for something bent. Look at the tabs and tubing to see it's not cracked or bent.
Then I would get a tape measure and measure everything from one side to the other. Suspension is symmetrical. It should measure the same from one side to the other. There should be frame points to measure from.
If all of that fails I would pull the shocks and see if one's blown out.