[IOS Factory] D-SYSTEM Drag Upgrade Kit for SF

D-SYSTEM SF

IOS D-SYSTEM for SF



The lightest drag system ever for the DAIWA SF series has been finely tuned.
While retaining the high performance of the rigid and mechanical IOS drag system capable of controlling even a 1 lb line, this is the lightest and most beautifully functional design in the D-SYSTEM lineup.
A drag customization part truly worthy of the name SF (Super Fines).

* The product comes as an all-in-one package, including tools, adjustment shims, and bearings.


| Compatible Reels

DAIWA SF Series (EXIST SF, AIRITY SF, LUVIAS SF 1000–2500, etc.)


| Included Items

- D-SF Main Unit
- Installation Tool
- Adjustment Shims (0.5 / 1.0)
- Dedicated Bearing
- Fixing Ring


| Installation Method

1. Remove all Genuine drag unit parts, leaving only the main shaft.
* Reuse the original set screw.


2. Set the D-SF main unit and firmly tighten the set screw using the included tool to secure it.
* The set screw is reused from the Genuine reel.




3. After setting the 1 mm adjustment shim, install the bearing.
Secure the fixing ring firmly.










4. Rotate the handle to check that the D-SF does not interfere with the rotor nut.
If interference occurs, remove the rotor nut and the washer beneath it, then reinstall and tighten the rotor nut again.


5. Wind the line and check for uneven winding.
Normally, the default adjustment shim is 1 mm. If the line forms a reverse taper, add more adjustment shims.
If the line forms a forward taper, reduce the number of shims.




6. Replace the drag felt inside the spool with IOS Hydra and apply Shirokuma Drag Grease for even higher drag performance.


| Troubleshooting

Q. The line winds unevenly.

A. Check that the D-SF is firmly secured.
Normally, the default adjustment shim is 1 mm. If the line forms a reverse taper, add more shims. If it forms a forward taper, reduce the number of shims.


Q. When retrieving, the D-SF interferes and makes noise.

A. If interference occurs, remove the rotor nut and washer beneath it, then reinstall and tighten the rotor nut again.


Q. The D-SF still interferes and makes noise.

A. Check whether the D-SF main body is loose. If so, firmly tighten it with the included tool.


Q. The spool cannot be fully seated.

A. Check whether the drag spring is interfering.
Adjust by slightly compressing the spring end to ensure the spool fits properly.


Q. The D-SF does not fit on the shaft, or it wobbles after installation.

A. Confirm that the reel is indeed an SF model.
For detailed compatibility information, check the IOS website or the product QR code.


Q. The drag sound is too quiet or too loud.

A. Adjust the end of the spring by spreading or compressing it to fine-tune the drag sound volume.


| Enhance Drag Performance With Drag Washers, Drag Units, And Drag Knobs!




*SDSY