Clutch Floating..HOW!!

the float is the amount the secondary moves back and forth on the shaft. i usually just ad a couple of washers under the bolt that holds the clutch on to give it a bit more play.

You are correct.

Float as defined in the Polaris RMK arena is to allow the secondary to "slide" on the splined shaft.

As the primary engages the belt does not quite stay in the original center line ... although in theory it should stay at centerline.

Plus ... maybe a little chassis torquing or flux from thermodynamic warping is compensated by the secondary float. But this is more than splittin hairs.

Don't take off all the washers. I had 4 washers on the secondary and removed two (2) washers.

I also greased the shaft a little but don't think it made much difference in the long run unless I greased it up at every gas fill up.
So I sprayed a dry lube base coat on it.

Having a bit of float on the secondary also keeps the jackshaft PTO bearing from becoming side-loaded. That bearing is not designed for side load, so it's important to not have the clutch tight against the bearing.

I remember the 05 900 had a lot of problems with weak motor mounts, as the big engine flexed the mounts failed, making belt life a matter of hours instead of seasons. Getting the engine planted with good mounts and a torque link and/or push stop seemed to help belt life. Can't hurt to check your engine mounts...