ARCTIC DVX 90 Performance - Restrictor & CDI

Can someone help us out on how to remove the clutch restrictor and find a high rev CDI for a 2006 arctic cat 90cc DVX? We are trying to get some improved top end and the atv is currently bone stock and our kids have reached a good riding level so we are ok with it delivering better performance.

1. Remove the variator/clutch restrictor. We've seen a couple of postings but aer still a bit lost. We've attached a clutch assembly picture from the parts schematic found at World of Powersports (Arctic Cat ATV Microfiche Links). Maybe someone has done this removal and can use the attachement to identify the restrictor which apparently is some kind of brass bushing between the variator and clutch pulleys. We can also take some pics of our motor with the clutch cover removed if that would help.

2. High performance CDI box. We have read about replacement CDI boxes from vendors like Big Gun, Rev Max, Dynatek, HotShot however, we cannot seem to find any applications for the 06 DVX 90.

THANKS!!!!!!!!!!!

[Lost Lake]

Is your atv a 2 stroke?