Zero FXS 2019, Owner'S Manual

Page: 53 / 158

General Operation
4.9
Front Suspension Adjustment
A shock has two main actions: compression when the
shock gets loaded, and rebound when the shock returns
back to full length. Compression damping is the
adjustment that determines how fast or slow the shock
compresses. Rebound damping is the adjustment that
determines how fast or slow the shock rebounds.
Measuring Preload
Obtaining the correct front suspension preload (sag) is
critical for proper handling. The spring preload must be set
to match the weight of the rider. The spring is preloaded for
a 180 lbs (82 kg) rider. This puts the front wheel 1/3 of the
way through its vertical travel. Heavier riders require stiffer
spring rates. A good approximation of your front springs
requirements can be found by measuring the front
suspension’s sag. This measurement quickly determines if
your front springs are approximately correct for your
weight. This adjustment is a recommended guideline;
personal riding preference may vary from the
specifications given.
To Check the Sag Value:
1. Support your motorcycle upright on a stand with the
front wheel off the ground.
2. Measure vertically from the bottom of the fork tube to
the bottom of the tube’s dust seal.
3. Record this measurement (this is the measurement
referred to as M1 ).
4. Remove the motorcycle from the stand.
5. Wearing your normal riding apparel, sit on the
motorcycle.
6. Have an assistant hold the motorcycle upright, your feet
should be on both pegs.
7. Bounce the suspension a couple of times.
8. Have a second assistant take a measurement using the
same locations as in step 2.
Zero Owner's Manual (FX and FXS).book Page 9 Tuesday, October 23, 2018 1:54 PM