Below is some exerts from a e-mail between myself and Dalton about this kit. The short answer is the weights that come with the Ranger 900 are good, and the only people that would benefit from changing from the stock clutch are people who go with bigger tires 28" and beyond, even stiffer springs don't not change much or overcome the load of the tires and the high range gearing of the Ranger 900.  Meaning, once you go over 28" tires on a Ranger 900, you can't improve clutching to overcome the load. So it is like, this is as good as it gets regardless. 

From a business standpoint, putting new flyweights in a kit you stand to make more profit but once again Dalton puts value to the customer ahead of profit.  On Dalton, I have tried to make them wrong before, can't do it.

From the Emails:

For stock...leave the whole thing alone (stock) and don’t touch anything....for oversized tires you add the kit (a primary and a secondary spring (you have 2 primary springs to choose from and one is almost free).you always use the kit which is a primary and secondary. it is for ANY tire bigger or heavier than stock. the bigger the tire you go , the more you lose for performance...but it is the same springs regardless of tire size.

My preference would be to never go larger than 28, ...and that is based on a whole lot of good tests in different conditions with different tires.....but people will run what they like for tires no matter what we say, so it doesnt matter to me. even for the 30 inch we spent a lot of time testing, the same two springs is as good as anything and more parts isn’t better ...just that larger tires make something that is totally designed wrong (gearing) from the factory work worse and have slippage at a point when it really shouldn’t.

We are not changing the final drive ratio in the diffs...we can’t make the secondary clutch a 1" larger diameter to get in back inside the envelope of acceptable...we just have to work with what is there.

The polaris engineers continue to design this vehicle with high range too high....it is easy to prove.

At one point we thought we were all set, but we always go back through it several times with hot belt, cold belt, back through a lot of the tests again in slightly different conditions. One of those last test got us to trying some different spring pressure that we had developed for testing other models, and we got the shift pattern with just spring pressures and no weights needed.

You don’t sell people things they don’t need....and they don’t need weights here. Will people who don’t use low have belt troubles with big tires?...yup...they will find it works way better with the kit we have for sure...and it is cheap......but adding more parts is not a benefit...and it is not a thing that is required...to make people think that they should buy "more parts is better"....because it is , once again on a ranger..a GEARING issue...and it is WRONG to try to cover that up with clutching..it will only help so far and the springs here will do as good as anything...we built lots of stuff to try (that a part of me wants to sell)...but no way...we won't sell people false hope or BS...they don’t need it.

If they use bigger than 28" on a ranger they better be in low a LOT...and it is not clutching

This spring combination on the non ebs that most have, we tested works good and it does help...,The kit is 2 primary springs and a secondary spring (new as well for the standard clutch...we had others for that BOSS clutch, but this one is new) we even include a second primary spring for engagement preference (and it is priced at almost like the kit was just 2 springs...we are practically giving away the 3rd spring but feel it should be there......because different riders like one or the other.

I like one better...corey (his son who works there)  likes the other....and we both feel strongly about it, so we get other riders...and they are equally divided.

One primary engages almost like stock...the other is lower ( it is a fine line...can’t go lower than this new one or it would be engaged at idle and would not shift correctly....but fine with the one we use that is a little lower than stock ...fully compressed rate is similar on both