| Race Sag or Preload is one
of the most important set-up procedures you
can make to your motorcycle. Sag is how much
the shock spring settles with the rider on
the bike,when set properly it allows the supension
to work in it's proper designed range.
To set your sag follow these steps:
STEP 1
Place the bike or ATV on a crate or stand
so that all the wieght is off the rear wheel.
Take a tape measure or ruler and measure the
distance from the center of the axle to a
specific point on your rear fender or side
panel. The location does not matter so much
as repeating the measurement in the same exact
location when you get on the bike.
STEP 2
At this point you need another person to read
the tape measure and a third person to hold
the bike is even better.
Take the machine off the stand. Put it on
level ground. (Preferably your garage floor.)
Bounce lightly a couple of times. Position
yourself in the neutral position of the seat
directly above the foot pegs and have all
your wieght on the machine. Bounce up and
down a few times to make sure the linkage
is moving freely. Have your assistant measure
using the same points of your first measurement.
Write this figure down below the first measurement
and subtract the two measurements. Example:
605 mm -505 mm
100mm = RACE SAG
STEP 3
Loosen the lock washer above the spring preload
ring on top of the shock spring with a long
punch and hammer. Once that is loose, you
can adjust the spring preload ring. If your
measured sag was over 100mm, you will want
to tighten the spring to compress it. Follow
Steps 1-4 until you get your sag close to
100mm.
STEP 4
Check Static Sag
Place the bike on the stand and measure again
with no load on susp. Now take the bike off
the stand and with the rider off the bike,
measure how far the bike sags on it's own
wieght, again using the same points as before.
Write this figure down and subtract it from
the first.
Example:
600 mm - 580mm
STATIC SAG =20mm
*Note: With the race sag set at 100mm, the
proper static sag should be between 15mm and
25mm (1/2" - 1").
If the static sag is less than 15mm; you
need a lighter spring. If it is more than
25mm; you need a heavier spring. Call us!
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