INITIAL SPRING PRELOAD SETTING (SAG
METHOD)
To set up the rear suspension torsion spring preload, measure the distance
between the ground and rear bumper. This is measurement X.
Take the first measurement with no rider and with the rear suspension at full
extension.
TIP
The rear bumper may need to be lifted upward slightly to fully extend the
suspension.
Next, have the rider drop down hard on the seat and bounce up and down
several times, collapsing the rear suspension. With the rider seated, measure
the distance between the ground and the rear bumper at the exact location used
for measurement X. This is measurement Y.
To determine sag, commonly referred to as ride-in, subtract measurement Y
from X (sag=X-Y). If the measured sag is incorrect, adjust the FRA position and/
or rear torsion spring preload.
SUSPENSION RECOMMENDED
SAG
ADJUSTMENT SEE PAGE
INDY 121 3-4 inches (7.5-10
cm)
Torsion Spring
Preload
page 39
INDY 155 4 inches (10 cm) Torsion Spring
Preload
page 39
INDY EVO 1.5-2.5 inches (3.8-
6.3 cm)
Torsion Spring
Preload
page 39
38
THE PERFECT FIT
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