High-G FJR Junkie!
Join Date: Jan 2013
Location: Millgrove, ON, CA
I'm not a suspension expert either, just gathered from personal experience and inputs from the forums, used Yamaha's own data for the matrix. I don't know Yamaha's thinking except to design something OK for the majority and hope it works, their majority seems to be for someone 150-180 lbs.. most of us aren't that high school weight any more...
If you're a twisty rider, a little more spririted, you're going to want something better... talking spring loads only for a sec, it has to carry your weight first, then the damping comes into play. I think most of us know the Gen1, 2's had notoriously soft front springs, e.g., and an upgrade in spring helped the most. Personally, I think the OEM fork damping is OK.
ES rear spring data is published for '14-'15, 685. If you do the calculation for the dual spring shock on an A, you'll see I noted it is 651. I only have testimonials from ES riders, and know that the A rear is too soft. I have measured sag with various weights ES riders at various preload settings. In my case at 200 lbs, the aftermarket 850 lbs spring works for me, 950 was too stiff, I'm sure I could get away with 800 if I could dial in preload (love that hydraulic adjuster). ES riders who want to play spirited tell me they set rear preload to two-up... hints at the one-up situation hasn't got enough spring.
If you're a touring type rider, you're going to care less, and like the softer ride, or it just does well for you.
Fork springs were always weak, the Gen3's got stiffer ones, about time. ES got straight rate 1.0, A's got a dual rate, which IMHO, that lower rate is too soft (0.85), and in my case, I have the preload dialed all the way in to get me closer to the 1.0 feel and less dive.
Suspension is personal preference in the end, and there is no one perfect one fits all. I bias my settings towards, what's happening in the more extreme case, like taking a curve hard, and not having it wallow around. I know I don't do that all the time, but I want to know it's going to be more controlled if/when it needs to be, yet it gives me a good ride for 90% of the conditions I ride in.
Keep yer stick on the ice....
2014 FJR1300A - Root Beer (sold)
2009 CBF1000A - Sienna Red
1999 VFR800Fi - Pearl Shining Yellow