Ski Pressure...

[snow_rider]

I rode my new 08 RTX this past weekend for the first time, and in general I really liked the way it handled etc. Coming from a 700sx though, it seemed to be 'pushing' in the corners. Typically to correct this you would tighten up the front limiter straps to give more ski pressure, at least this is what I would do on my pro-action chassis. I was surprised to find that on the Nytro you can change the strap holes but even on the tightest position the skid doesn't move up any? It basically only limits the rebound distance.
So I tried loosening the front shock spring so it now spins easily buts not flopping loose. This seemed to help a little.
So how would I get even more ski pressure? I was going to drill new holes in the strap, compress the skid, then insert the bolts and tighten?
Is this the only way, or is there a better way, or is my condition just inherent to the Nytro chassis?

08 Nytro RTX
09 sub-frame
Shaved upper ball joints
1/2" toe out
6" double Woody's
60PSI in the Floats
Loose (as possible) front/rear shock spring

 

[Groomer08]

adj

to get ski pressure u can do 3 things.
1st, increase front(ski) shock preload
2nd, decrease the front shock in the skids preload
3rd, increase the rear shock in the skids preload.
you said u already shortened limiter strap.
(that would be 4)

 

[arteeex]

How does increasing the preload on the front shock increase ski presure? Does this make the front end heavier?

 

[Groomer08]

BIAS

it doesnt make the sled heavier. it might make the steering feel heavier if u go too far.
all your doing is changing the weight bias. there is only so many points to do it. if others are maxed out, you have to use others.

alot of guys think the nytro has too much ski pressure, so the first thing they do is back off the front(ski) shocks. so if you have one that doesnt have enough ski pressure, put it back the same way others take it off.

Just measure ur current settings, and then try it. if it dont work, put it back. takes 10 seconds. U own it play with it.

ever try a m10 suspension? i carried a 9/16" around for a month dialing it in!

 

[jonnygym]

Front Shock Pre load

So many different posts some say you will get better carving and less push if you take air out of the the shocks now Groomer is saying increase the pressure.
Whos right whos wrong???

 

[sd5500]

I thought increasing center shock pre-load will decrease heavy steering?

 

[**sj**]

I thought increasing center shock pre-load will decrease heavy steering?

yep..increasing center shock spring preload will decrease ski pressure...for more ski pressure decreasing the preload will increase it

 

[Groomer08]

what the?

increasing the center shock preload(i called it the front skid shock) will take pressure off the skis and place it on the skid, FIXING heavy steering.
however,
he said his sled is pushing in the corners, so he needs more ski pressure. so u need more of the machines weight pushing on the skis. Fastest way is to increase front(ski) preload. this will imediately lift the front of the sled and push back against the skid, wich should push back on the skis.
if you want the skid to push back harder against the skis, increase rear shock in the skid preload. if this seems negated by some unseen force, the front shock in the skid is holding too much weight, lighten its preload and the weight it was carrying will be transfered to the skis.



for the guy with the floats...your situation is more complex. however, in general, decreasing preload on the front shocks lightens ski pressure and reduces darting and ski lift.

 

[jonnygym]

Darting and Pushing

I have a 2009 Nytro RTX with stocks skies and carbides.
My sled was pushing all weekend and also darting enough at higher speeds to make me back off before I hit 70 mph. Sad when I had troulbe keeping up with an old polaris 600
It was reccomended that I put dual 6inch carbides on,(The stock carbides are a 3 inch joke)
I hope this helps me with both problems????

Frustrated!

 

[Grimm]

At minimum, change out the carbide runners, 6 inchers should be good, and to decrease darting get the Studboy Deuce bars. A better solution to improve steering, get some new skis.

You can also shim the ski rubbers so there is more weight on the rear of the ski. On a concrete floor, the front of the carbide should be just off the floor.

 

[mach9]

My XTX is set up for fast trails mostly.
I don't care how difficult it is to turn when I go slow.
I absolutley hate pushing at 60-70mph.

Preload is set very high on front arm shocks.
Preload is set very low on front center shock.
Front Strap down one hole.
Preload is set very high on rear coil springs.
Transfer rods at 3/4 near red line.
Dials on shocks are mostly mid point.

I don't get push and skid will allow for some panic sideways slides when braking.
Deceleration can be darty at times, but nothing to be worried about.
Straightline braking could be better, but again not a big deal.

 

[dirkdiggler]

The Nytro is never going to corner like a trailing arm Yamaha. But that 97 SX would have never taken the pounding the Nytro walks through.

 

[snow_rider]

Hey, thanks for all who replied. I plan to double check my front straps to make sure there on the tightest hole, I will also try and bump up the PSI on the Floats a bit, say to 70. If that doesn't seem to work I may try and drill new strap holes to suck the front skid a little more.