All this is interesting as Yamaha's are known for their reliabilty and CDI + Stator issues are something we Yamaha owners/riders have never had to worry about.
We are all, [Vipers + SRXs owners], entering into an era where our sleds are aging to the point that even our Yamahas are having stator issues. Of course our sleds had to get around 10 years old before this started showing up!!
Most Cats + some Ski Doos usually have come up with stator issues in less then 3 years of age!
I had performance issues on my 2002 SRX that a new stator helped cure as well...I guess we shouldn't be too critical since our sleds are reaching an age that most owners of other sleds can't even dream of !!!
JM.02c