Need some M-10 tuning help

V

vmax700sx

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I have an 03 Viper. The M-10 was installed prior to last season. I had a darting problem, which I understand is due to too much ski pressure.
Over the summer I removed the m-10 shocks and the ski shocks to have them rebuilt. I was planning to adjust the suspension after I reinstalled the shocks.
After I reinstalled the shocks I can see that there seems to be much more ski pressure than before the shocks were rebuilt. The rear of the track is up off the ground about 1 3/4"
The limiter strap is set at 3/3.
The front arm is in the lower hole on the rail.
Rear arm is in upper hole in chassis.
I am wondering if I damaged the front suspension when the shocks were removed because I did not support the front of the sled while I was waiting to get the shocks back.
Does anyone have any suggestions on how to proceed?
 

Interesting! did you measure the length of your shocks before and after? I'm wondering if you got some short travel shocks back by mistake...

You probably had some darting due to the rear of the sled sitting higher than the stock ski bumpers are designed for. It's not too much ski pressure (the kind you get when you tighten the limiter straps on the front of a skid) but too much pressure at the front of the skis.

Read through the article on darting in the tech page, and see what ya think.

I bet MRSled will have an answer on the skid sitting goofy...
 
Vmaxjohn,

Thanks for the response. You may be right with the darting. I will check the wearbars and see how they have worn. I never rode the sled with the M-10 so I don't know if it darted with the stock suspension. Maybe I am blaming the M-10 when I should be looking at the ski's
I really don't think there is too much ski pressure because I can turn the handle bars with one finger when the sled is on concrete. Isn't that an indication the ski pressure is ok?

As far as getting back the wrong ski's I suppose it is possible but I doubt it.
Is it possible that the shocks were rebuilt incorrectly, or maybe something is out of wack because I didn't block up the front end when the ski's were out of it?
 
The sled rested on the belly pan? Should mess anything up, unless you dropped like a red headed step chile... :lol:

Darting can occur when a long travel skid is put into a short travel sled, but with good fine tuning or the shim mod, it shouldn't continue. MrSled's SRX was a case in point, he tuned the skid for good sit in (as any skid should really) and didn't have a problem. I think he's got C&A's on there too?

All these problems should be fixable...keep posting!
 
Thanks for all the input. Gotta get this fixed before the snow flies!!!!!!!!!
 
Assuming the front end is straight and wear bars are good I would increase the preload on the center shock spring.As the spring gets weaker overtime. I run my limiter straps in the 4/3 or 4/4 position.This will lessen the ski pressure and reduce darting.
 
Well, it turns out the problem of the track elevated in the rear was due to bad shocks. When I pulled them off they were totally soft. I didn't look at them to start with because they were suposedly rebuilt. I don't know if they failed after I installed them or they were bad when I installed then and I just didn't catch it.

As far as the darting I am going to try the shims. I will post back with my results

Thanks for everyone's Help!

Now if someone can order some snow...................................
 
I had a m-10 in my viper last year, and had no darting problems. This is how I had mine set-up. I let the limiter out all the way, reduced the front spring pressure until it was almost loose. I then set the FRA(rear angle adjustment) to 1 1/2 lines less then what the fast manual says. I did this for weight transfer reasons, and had to increase spring tension after they were broke in as it would transfer too much. I also had front and rear ohlins on the rear skid, so was where I made my adjustments when the trail conditions changed so I could keep a good ride. To keep it from darting I would let the limiters out somemore, and then play with the rear spring preload, and fra. The m-10 has unlimited settings if you are willing to take the time and play with it. I would get the manual and set it up to your weight and then start tinkering. You don't get much transfer to these specs, but it is a great starting place.
 
To eliminate darting try set of the dual ski runners, available almost everywhere. These are what Polaris uses with their M-10's. they worked great on my two 600 classics. :arrow: Also go to Snowtech Magazine and clik on Article Archive & go to"Basic M-10 Setup" . This is a very good writeup that helps getting started.
 
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