The first thing that you will need to determine is which length REVO ARCs you have. If you are unsure of the length, you will need to measure the shock from the center of the top shock mounting bolt to the center of the bottom mounting bolt (referred to as eye-to-eye measurement) with the motorcycle jacked up and no weight on the rear suspension. This will determine how much sag you will need based on your shock length as seen below.

13” Shock = 3/4” -  1-1/4" Sag (11 3/4” -  12 1/4" eye-to-eye measurement when the rider/rider & passenger are sitting on the bike)

14” Shock = 3/4” -  1-1/4" Sag (12 3/4" - 13 1/4" eye-to-eye measurement when the rider/rider & passenger are sitting on the bike)

Once you have determined the amount of sag required for your specific length of shocks, remove the jack from under the motorcycle and follow the instructions listed below:

STEP 1: Ensure the springs are adjusted evenly before starting. (There should be the same amount of threads shown below the spring on each shock)

STEP 2: The rider needs to sit on the bike with the weight fully on the bike.

STEP 3: Once the rider is sitting on the bike you will want an extra person to measure the distance between the center of the upper and lower shock bolts (eye-to-eye length).

STEP 4: Compare the measurement you get, to the recommended sag setting listed for the length of shock you have. If you have more or less sag than what is recommended for your length of shocks, you will need to turn the springs by hand to achieve the proper eye-to-eye measurement for your length of shocks. Below is a description of how to adjust your springs to ensure the correct target measurement with rider/rider & passenger weight on the bike:

13” Shock:  The target measurement that you will want to achieve is 11 3/4" - 12 1/4" eye to eye.

With rider/rider & passenger on the bike, if you are measuring more than 1 1/4” of Sag (less than 11 3/4" eye to eye) you will want to turn each shock spring the same amount of turns to shorten the spring so the spring tightens. Depending on how far the measurement is off will determine how many turns the springs will need to achieve the 3/4" - 1 1/4” of Sag.
If you are measuring less than 3/4” of Sag (more than 12 1/4" eye to eye) you will want to turn each shock spring the same amount of turns to lengthen the springs, so the spring loosens. Depending on how far the measurement is off will determine how many turns the springs will need to achieve the 3/4" - 1 1/4” of Sag.

14” Shock:  The target measurement that you will want to achieve is 12 3/4" - 13 1/4" eye to eye.

With rider/rider & passenger on the bike, if you are measuring more than 1 1/4” of Sag (less than 12 3/4" eye to eye) you will want to turn each shock spring the same amount of turns to shorten the spring so the spring tightens. Depending on how far the measurement is off will determine how many turns the springs will need to achieve the 3/4" - 1 1/4” of Sag.

If you are measuring less than 3/4” of Sag (more than 13 1/4" eye to eye) you will want to turn each shock spring the same amount of turns to lengthen the springs, so the spring loosens. Depending on how far the measurement is off will determine how many turns the springs will need to achieve the 3/4" - 1 1/4” of Sag.

NOTE: For the best ride quality, you will want to adjust the Sag/Preload anytime you add/take away weight from the bike.