Steering

[still trying]

With a bike standing on a flat surface the steering angle is the angle from the surface, to the Pivot axis in the head tube. No amount of changing the triple clamps, forks, axle offset, etc will alter this. 

It can be changed by altering the rear height, or the front height (sliding the forks up or down in the clamps). Basically "tilting the frame relative to the ground".. Or chopping the frame, (last resort please).

Thus rear shock preload will have a big effect on steering.

Also the way the power comes on can effect steering.

As noted above riding position has a big effect, moving the handle bar clamps, and foot pegs to get the rider; a, comfortable, and b, in the right position is one of the most important things to get right. After all the rider is a major weight component.

The factory settings are generally about the "middle" of the usable range. All aspects affect each other on the bike, so change one affect others, eg, raise the rear for ground clearance, and steering head angle is steepened (front forks now have more sliding friction, (impacts from bumps are more "side" impacts), C of G is higher thus balancing is now harder, and so on. Best to do a lot of work with shock heights/stiffness, and rider position, before changing the frame, at least in my opinion.

Choose carefully, and good luck