Just got some 13" JRI shocks, 25nm springs. Took some measurements and just want to make sure I'm on the right track. I bought them secondhand so didn't get any paperwork with them for set up.
I weigh 180. Probably 10 pounds in my bags and 50% riding with a 120lb passenger.

With the bike up on a lift I got 280mm or 11"
With the bike weight only, I got 254mm or 10" (26mm or 1" of static sag)
With me sitting on the bike, bags off, I got 241mm or 9.5" (an additional 13mm or 0.5" sag)
From bike up on lift to me sitting the difference is 38mm or 1.5".

I'm guessing, but it looks to me like the difference is too great with just the bike weight on, and not enough from bike weight to adding me. If that makes sense.
Should I lighten up the preload or????

It felt good as is on a 300 mile ride, but I want to make sure I'm getting the most out of it. Thanks!

 

 

Puglia...I'm running he same shocks on my 17 RKS. Love em'. Here's the sag set-up procedure right out of the JRI manual.

Setting the Sag

STEP 1
1) With your shocks installed on the motorcycle, extend the rear wheel until it is off the ground or the rear
suspension is topped out. Measure from the center of the top shock bolt to the center of the lower
shock bolt.
2) Record this measurement as "A".

STEP 2
1) Let the motorcycle sit under its own weight with you on it and measure from the center of the top shock bolt
to the center of the lower shock bolt.
2) Record this measurement as “B”

STEP 3
1) Subtract measurement "B" from measurement "A". This number is your total sag.
1a) typical total sag numbers are 28mm-32.
If the sag is greater than 32mm, preload the spring by turning the
adjustable spring collar clockwise.

If the sag is less than 28mm, remove preload by turning the adjustable spring collar counter clockwise.

SETUP TIP: The user can run a Zip-Tie around the shock shaft to
help with measurement of the Preload if no assistance is available
to the rider. It will also greatly assist the rider in tuning their JRi
Shocks for Harley-Davidsons

Tuning:
A. Change one adjustment at a time, write that change down, and evaluate the change with
notes for each change.

B. Your Jri Shocks come preset with preload and damping settings optimized. You may
need to make changes for optimum performance. Changes and performance adjustments
should emphasize the following in order:

1. Stability – Ensure stability of the bike in a straight line at speed is achieved.

2. Compliance – Once the motorcycle is verified as “stable”, then focus on fine tuning the
performance of the shock.


If you find that you have changed your settings too much and are “lost”, reset the preload
and sweep valve (external adjuster on the bottom of the S/A shocks) to the following:

1. Preload 10mm (Spring length 7 & 5/8”)
2. Sweep Valve: 30 clicks out “from all the way in”. NOTE: DO NOT TURN IN THE SWEEP VALVE
ADJUSTER with excessive force or you may damage the damper needle. Use only mild force (less
than 3lbs of force) when “turning in” to re-set or verify the sweep valve adjuster position.

 

PM me your email address. I'll send you the complete original instructions from JRI