Yamaha Discussions about Yamaha ATVs.

Need some help setting up the rear shock on the Raptor

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Old Oct 26, 2001 | 02:21 PM
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IceMan11's Avatar
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Just got some works shocks with rezzies on the front of my Raptor... nice, but...

I've noticed the back end of my Raptor likes to hop around alot on bumpy trails. I'm assuming that the suspension is too stiff on the rear, but I'm no expert. Anyone give some advise? I'm about 175 with full gear on.
 
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Old Oct 26, 2001 | 05:04 PM
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compression...2 more clicks in (clockwise) from factory spec
rebound...2 more clicks in (clockwise) from factory spec
 
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Old Oct 26, 2001 | 05:07 PM
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Have you already reduced the shock compression dampening force via its adjustment screw?

This seemed to take away the tendency of my back end to hop up on rooted trails.

Also, backing off the spring pre tension helped some too.
 
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Old Oct 26, 2001 | 05:53 PM
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The rule of thumb is:
On th rear pull up on the grab bar untill the wheels are ready to leave the ground, take a measurement. Sit on your quad (full Gear) the rear should sag thirty percent of your measurement.
The front is the same, except twenty percent of your measurement.
once you establish this base line then dial in your rebound to your liking.

Good Luck!
 
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Old Oct 27, 2001 | 03:59 PM
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I haven't done anything to the rear shock. Everything on it is at factory spec. I'm going to try you guys suggestions and see if they work.
 
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Old Oct 29, 2001 | 11:07 AM
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You should have an extra ~1" on the front from your works shocks which changes the geometry of your bike, the easiest thing is to increase compression and rebound on the back shock, possibly change the preload but you might get away with just the rebound/compression adjustments
 
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Old Oct 29, 2001 | 11:38 AM
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Too much rebound dampening can "pack up" the shock/spring by not letting it rebound fast enough in multiple hits. This leaves the shock in a higher spring rate when it hits the next bump. BAM! You're better off starting loose, then increase your dampening just a couple of clicks at a time. Adjust it out on the trail. Your butt won't lie to you. [img]i/expressions/face-icon-small-shocked.gif[/img]
 
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Old Oct 29, 2001 | 02:45 PM
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Yeah, the extended a-arms on the front did give me some more travel. If I remember what works told me, I have 11.1" of wheel travel on the front end now. I bumped compression and rebound up two clicks. I'll test it this coming weekend (and hopefully fine-tune it).
 
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