How to adjust f-18 shocks - Yamaha Rhino Forums - Yamaha UTV Forum
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post #1 of 4 (permalink) Old 03-04-2009, 06:54 PM Thread Starter
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Location: Logandale, NV (las, vegas)
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How to adjust f-18 shocks

just as it says i need help adjusting my shocks, i bottom out pretty hard on dune transitions and bucks heavy in the whoops. which clickers do what and i know it has been talked about allot but i am not a shock guru. i need basic instructions. on what does what,
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post #2 of 4 (permalink) Old 03-04-2009, 07:04 PM
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whats your pre-load ride height set at bottom of skid plate front and rear, i set mine at 10.5"rear and 11.5" front, then 0 out the other adjustments and play with them by feel, but you need pre-load right to start.

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post #3 of 4 (permalink) Old 03-04-2009, 07:07 PM Thread Starter
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i set the springs to full way out then tightend them about 3/4 of and inch. i will try to zero out the adjustments. is that right in the middle? or all the way turned in or out?
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post #4 of 4 (permalink) Old 03-05-2009, 05:18 AM
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If you call up I-Shock they have/had great support.
I called them after i bought mine.
Here are my notes.
HydroDynamics USA, Inc.
West Coast Regional Office
9303 Bond Ave. Suite C
El Cajon, CA 92021


HydroDynamics USA, Inc. : Home of the iShock™

Model: F-18

Technical support: 619-390-2430
One week turn around for shocks sent in.

Shock controls all adjusters

 Turning clockwise: stiffens / slows

 Turning counter clockwise : softens/ speeds

Top of shock:

 Brass screw = Low speed damper (controls shaft velocity) Slow rolling terrain.

 Blue Nut = High speed damper (controls shaft velocity) Big whoops and air.

Bottom of shock:

 Brass screw = rebound control
(how quick shock recovers from compression)


Spring Lengths and rates:
Rear springs: The rear shocks come stock with: 375 rating.
Spring rates available for the rears are: 400 and 425.
9.25 inches = Resting length of rear springs
8.50 inches = Max preload length of spring

Front springs: 220 spring rating - no optional front spring rates available at this time
11.40 inches = Resting length of springs
10.25 inches = Max preload length of spring

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06 Rhino 660
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