Generally, if you introduce more air, you need more fuel. Not knowing what the airflow is like with the stock filter, it's difficult to determine if a cone filter would flow more air. My guess is yes.
I would plan to increase main and slow jets by two sizes each.
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Weldangrind
"I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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