Fluid weight won't help sag at all. It will only make more dampening force. The problem with using heavier oil is that when it get hot the characteristics will change. The thinner the oil the less the change when hot. I'm running 0 wt. redline synthetic but had to re shim them to make it work. If your running stock valving 15 wt. will have way too much compression force. It's already to high with stock oil.
I guess i'll fork over the $$$ for stiffer springs. I have the service manual and it doesnt look to difficult to put them in. I suppose i should buy the special service tool from dan kyle or traxxion to make the job eaier though.
A forum community dedicated to Honda Fireblade motorcycle owners and enthusiasts. Come join the discussion about performance, racing, modifications, classifieds, troubleshooting, maintenance, and more! Find conversations about your favorite CBR 900 or 1000 series RR models.