verslagen1 wrote on 06/14/17 at 12:09:45:
But if you do want more, look at the RYCA style caps that have a adjustment screw built into them.
Because of the flange on the OEM fork cap, a cap with preload adjustment can't be used on the upper OEM triple clamp. RYCA does not sell adjustable fork caps.
You can add additional preload on the spring just by adding a washer or two with an OD of 1-1/4" (the ID of our forks is 33mm). I would add them one at a time because just a few mm of preload makes a difference.
But before changing preload, you need to know this: adding washers does not change the rate of the spring, it only effects sag. If a spring does not have the necessary rate for the application, all of the preload in the world will not change a thing. Preloading does not make a spring stiffer.