Is 280 main's to big?

[turbowrenchhead]

Customer brought me an 01 shee. There is 120psi compression with a ARA racing head, dome size unknown. fmf riva's w/ power core 2's. Stock box w/ lid and Single K&N. Those are the only mods with stock ports, crank & pistons. Stock carbs have 280 main's. Is that enough mods to go that much higher in jetting?

[SAVAGE420]

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[Colby]

i run 280 main w/ K&N clamp ons, FMF's, and Cool-Head w/ 19cc domes and +2 timing .. @ around 2500 ft elevation ..  270's would probably be perfect, but i run all my bikes on the rich side

[turbowrenchhead]

Thanks good to know