2017-20 XP 1000 Two Seat Dalton Kit Info
The 2017-20 Dalton kit is only for the 17-20 two seater, the only difference in this kit and the 16 kit is there is no helix in the 17-20 kit. Polaris changed the helix for 17 and we found the helix to be ok. The 16's helix angle is just off therefore it needs a helix.
However, nothing wrong with buying the 16 kit for a 17-20 because you will get a much better quality made billet helix versus the cast aluminum one that is cheaply made. So if you are a 17-20 owner reading this and you bought the 16 kit you have a much better made helix now than if you buy the 17-20 specific kit. If you are a 17-20 owner and want to buy a kit, then you can buy either kit, one just comes with the helix and one does not and you would have a much better made helix.
Advantages of getting the 2016 kit with helix over 2017-20 without it
The only difference between the two kits is the helix. The set ups, weights spring etc and the need for it is still there.
The 17-20 clutch calibration is still off, meaning the springs, weights etc, they just got the helix angle right whereas the 16 was bad off and helix was off too.
You would still need the kit for the same reasons you would need one for.
Long explanation to say in a 17-20 run either kit you want, one has a helix and one does not and you don't "need" the helix in a 17-18 model unless you want it.
New Info: In 2017-20 Polaris uses a non-engine braking or a extreme low engine braking helix in the XP 1000, in 16 they used a really aggressive engine braking helix. So by using the kit with helix in a 17 and newer you will be adding some engine braking, by using this kit in a 16 model you will be getting less aggressive engine braking. Why? The ebs notch in the Dalton helix is what we call a less ebs notch, so it is there just not as aggressive as when Polaris does it. Hope this makes sense, if not call me.
Why is there a new kit? When testing on a 17-20 was done, it didn't "need" the helix so no sense in making you buy a kit with a helix unless you want the better one.