Reverse issue...........

[BombaPolaYama]

The upgrade kit includes an extra shim for the secondary clutch and a different (slightly longer or narrower???) belt. Too much torque on the shift parts prevents it from moving.

My phazer GT's reverse LED blinks until it drops into reverse then it stays on. I only shift after the RPMs drop.

Maybe your switch is busted?

Those were the first 2 fixes tried and they didn't work on all sleds so there are other fixes used since then. Talk to your dealer.