FMF factory 4.1 system jetting changes

Bike is definitely running lean .Anyone running this system and what changes to the jetting did you make?

How does she run with the FMF 4.1 is there a noticeable difference or is it just bling? Thanks

Peak Power similar to stock. Mainly more mid and a bit of bottom gain. Fair bit of weight saving.

I'm up one on the main and up one on the pilot in 50 degree weather at sea level. With just the slip-on more power everywhere including peak power IMO.

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