and how did it work ? i've heard some people say it was night and day difference ( for the good )
and others said it threw it off balance and made steering harder and push during cornering. i was thinking 3" total. and skip the expensive a- arms. this would be for wide trail riding only.

 

Even if you go just an inch longer, it will make a big difference.

 

sick sixty, i see that you have widened the front also. but just doing the rear will help also when cornering and also keep front more stable in straight line over whoops??

 

It'll help but doing the front also, will make it that much better.

 

Some people say that you get too much bump steer with spacers in the front. I haven't rode one with longer a-arms so I cant compare, but mine seems to handle great with the spacers. But yes, 3" is perfect. Any wider, it will be too hard on the wheel bearings and axle. Actually, anytime you widen out your quad, it's hard on it.

 

People think it adds bump steer but nope.
Bump steer is not caused from adding wheel spacers or flipped rims.

The idea of flipped rims/wheel spacers is a bad one in general.

Bumpsteer is caused from the alignment of pivot points at the frame. The only way to not have bumpsteer is this: having the tie-rod end that bolts to the steering stem pivot point, in line with the a-arm pivot points at the frame. If not, it will cause bump steer. Bumpsteer is when your wheels go through the travel and as they do so, the wheels will steer. Unbolt your shocks and put your front end on a jack stand. Now work the arms up and down and watch the wheels go in and out.

What you are talking about is known as "feedback" for the lack of a better term. Using wheel spacers or flipped rims doesn't change the alignment of kingpins or balljoints. All it does is puts the center of the rim farther away from the mounting plan of the upper and lower balljoints. This causes added stress and makes it harder to steer, and will also give more "feedback" through the bars.