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Old 07-26-2010, 12:10 PM   #19
Gangplank OP
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Joined: Jul 2003
Location: Las Vegas
Oddometer: 2,175
The basics from there....

Quote:
Spring Preload (Sag Adjustment)


Preload on the spring/springs is very important because it affects the height of the motorcycle and the fork angle. Consequently, handling characteristics can be changed, even negatively. Proceed as follows, it will be much easier and really should be done with two people.

A. Place the motorcycle on a stand.
B. Left up the rear end to the fully extended position.
C. Measure the distance from a point (can be marked on a piece of tape) immediately above the rear axle to the center of the rear axle. This a R1.
D. Make a similar measurement on the front axle with the fork fully extended. This is F1.
E. Allow the motorcycle (without rider) to apply a load and repeat the measurements. R2 & F2.
F. Then take the same measurements with the rider (in full riding gear) and equipment on the motorcycle. It is important that the rider have the correct riding posture so that the weight is balanced on the front and rear wheels in the same way as when riding. R3 & F3.

Your measurements should be within the following ranges.
Without Rider:
Rear 10-15 mm (R1-R2)
Front 25-30 mm (F1-F2)

With Rider:
Rear 35-50 mm (R1-R3)
Front 35-45 mm (F1-F3)

If these ranges are not meet, adjust preload accordingly and do it again.

Once single up adjustments are correct, perform step F above to determine camping or SO load adjustments. Mostly the rear preload should be effected enough to warrant adjustment.

These are sport-touring settings. If you do a lot of twisties, the “With Rider” measurements for the rear should be about 10 mm less. If you like it a little cushier, the “With Rider” measurements for the rear should be about 10 mm more.

Rebound Damping (Rear)

Start by adjusting the rebound damping to the OEM setting: Turn the adjuster screw all the way in clockwise. Then turn it back out about 7/8's of a turn. Take a test ride, find a nice bumpy street for testing purposes. The V-Strom shock rebound damper adjust has a range of about 2 1/4 turns. Full hard is fully clockwise & full soft is fully counter-clockwise

If the motorcycle feels unstable, loose and rather bouncy, then the rebound damping should be increased. Begin by turning the adjustment screw 1/4 turn clockwise. Continue to test ride & increase in 1/4 turn increments until you feel it getting hard & bumpy. At this point adjust 1/8 turn back and test again.

If the motorcycle is hard & bumpy, especially over a series of bumps, then the rebound damping should be reduced. Adjust in 1/4 turn increments counter-clockwise and test as above until the bumpiness is gone.

There is a happy medium in there somewhere. If all else fails, there is always Wilber’s, Sonic, & Race Tech!
Excellent info. Thanks!!
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