Need help with Viper MTX rear suspension.

Sharp · Nov 7, 2016

My rear suspension sags 4". When I lift up on the rear bumper, it will come up 4" before the track comes off the ground and drops 4" when released. The measurement was taken from the back of the tunnel. Is this normal? I have a 205lbs center shock spring and 160lbs of air in the rear shock. The skid is mounted to the bottom bolt holes on the drop bracket. I also have an Skinz ARC and a 162" track. Please let me know if this is normal or if not, what can I do to fix it?
Thanks

Winter Nutz · Nov 7, 2016

pretty sure it is with the fox float. seen a couple sagged out with the floats. try to pump it to 200? I used to run my nytro timberskid at 190psi

Sharp · Nov 7, 2016

I pumped it up to 200lbs and nothing changed. Nothings broken either. Should I add air to the ARC fox shock?

Winter Nutz · Nov 8, 2016

its hard to say without looking at it. how much ski pressure do you have and what are the limiter straps set to? sounds like you might have the rear of the skid contacting more than the front, they should work together. kinda sounds like its working like you have a block of wood under the rear of your skid and the rear is collapsing first.

Tricky Nick · Nov 8, 2016

Sharp said:
The skid is mounted to the bottom bolt holes on the drop bracket.
Thanks

I believe the skid is supposed to be bolted in the middle hole of the drop bracket from stock. Try that

Sharp · Nov 8, 2016

I feel stupid. Turns out I just needed to add more air. I hooked the pump to the rear shock (pressure was at 165lbs), than lifted the track off the ground and the air pressure drop to 100lbs. So, while the track was off the ground I pumped the shock up to 170lbs and lowered the track back down, minimal sag. The pressure stayed about the same so I left it. Thanks for the reply's.

motojunkie101 · Nov 16, 2016

I made the exact same mistake my first season with my timbersled suspension on my Nytro. Everything has to be done with weight off the shock. I know how you feel man, you aren't alone.

Happy trails!

guardianbike · Nov 18, 2016

bike

The overall length of the straps is 15.5 inches I think I went 17.5. Anti stabs are factory on the 15 mtx and I tightened the track a bit so it dosent pile up in front. The factory straps are tight when the sled is sitting on the floor even with the longer ones. I had my apex mtx beside it and noticed the straps aren't tight on the apex when sitting and transfers well so that's why I did it and it works really well.
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Need help with Viper MTX rear suspension.

Sharp

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Winter Nutz

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Sharp

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Winter Nutz

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Tricky Nick

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Sharp

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motojunkie101

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guardianbike

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