Hello, fellow bass fisherman; I recently purchased a new reel and was wondering if you guys could assist me in picking the perfect braided line to put on it; I’m looking for a 4LB test (BFS) Bait Finesse System line, preferably P.E. Any assistance would be greatly appreciated. 

Calling @bulldog1935 ?

The recommendation would be not to go below PE#1 diameter to avoid line dig.  

That said, I've fished PE#0.8 on 3 BFS reels including Daiwa with no problems (and Big fish)

A line I've gone back to lately is Varivas Super Trout Advance Max Power 

easier to link than say - but it's on 2 reels now - 

- https://www.varivas.fishing/products/super-trout-advance-max-power-pe-x8/ 

 

 

 

This is threadline, and needs a shallow spool to work best.  I can strongly recommend this aftermarket spool, which has moving SV rotor to solve cast jerk.  

https://www.ebay.com/itm/113871839091 

The vendor is in Thailand, where Ray's Studio is made.  The reel below is going into 4th (hard) year without a backlash.  

I have the JDM version of this reel and @bulldog1935 is correct.  I would stay around PE #1.0. I have been fishing 6 and 8lb FC on my Steez CT with no issues but on some of my other reels, I have fished YGK Upgrade and Varivas Dead or Alive.  Both have held up well. 

Thanks @bulldog1935! You’re clutch as always