Did you measure the voltage across the battery terminals at idle and when revs are increased? If so, what were the voltage readings?
The symptom you're describing does not sound like a failed stator. Unless there's more details/symptoms you've not stated.
I only say this as I'm currently on my 5th stator...
And failed stators are not that common with your model.
If you remove the stator cover it'll reveal some cooked windings if the stator is indeed f#%ked.
OEM replacement stator is ridiculous expensive. The aftermarket units are made in china and have been used with mixed success. The middle ground in terms of price, and usually best value for money, is to have your OEM stator rewound. Usually at a auto-electrical places that specialise in rewinding electric motors and alternators. The Rewind item is often better quality than the OEM unit, for about half the price or a little more.
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