Weight transfer

[Blown Up]

What is everyone doing to get these sleds to transfer weight? Viper ltx se and I have removed blocks, tried them on one, everything else. I am studded and this sled just doesn't seem to want to transfer weight from hole shot.

 

[DeerHuntr]

Limiter strap can affect it as can spring pressure , try letting the strap our first. Then soften the rear and increase the center pressure a bit. There is trade-offs to everything, you're going to sacrifice something.

 

[Studroes144]

The ltx se comes set with with limiter strap all the way out. I've come to the conclusion that if your sled is riding rough because of stiff suspension that that is the reason it doesn't want to transfer weight. If u can't get the rear suspension to squat down and stay there it isn't going to completely transfer the weight. I have suspension loosened up and transfer blocks removed and that helps but I think the biggest problem is the valving in the shocks is just too stiff on compression and it doesn't allow the rear suspension to settle in and dig. With my front floats on 65-75 pounds the sled will hardly pull the skis. It does hook up decent but could be much better. I have my floats up to 100 pounds now and that does help with weight transfer as it is putting more pressure down on the skid so you are able to feel the suspension sink some and dig in but still not great. My buddies xf7000 (identical to my ltx se) will settle right in and pull the front end up pretty good. Front end will come up 6-8" and sled pulls pretty hard. Only difference is the setup in the rear shocks. All springs are the same to my knowledge. The xf is more plush on the trails as well

 

[baggs66]

Can't expect this sled to dowheelies it's designed to keep front down when on the gas thru corners, not sure if their is away to stop slide on front arm and lock in place if that would allow transfer.

 

[Studroes144]

Can't expect this sled to dowheelies it's designed to keep front down when on the gas thru corners, not sure if their is away to stop slide on front arm and lock in place if that would allow transfer.

That's right there, it's never going to be a wheelie machine like the nytros were as it's designed to stay planted with the coupled rear suspension. But with proper rear suspension setup it will still transfer weight better than in stock form as the xf cats are a much better valving setup and they do allow you to pull the front end up when wanted

 

[DeerHuntr]

I can get my RTX to pull the front 6" or so on hard pack but I'm bigger than the average person. I also find it pushes a little bit in the corners but my carbides are still stock. Think I am going to pull my limiter strap up a hole or two, mine is all the way out as well. My blocks are set on 1, rear Springs softest setting and center shock is factory setting , 68psi in my floats, might go up a few pounds in them as well

 

[cannondale27]

Try a Rtx mine lifts the skis at 60 mph easy. I weigh 145. Hard to believe the 137 is that big a difference but it is. Going to have to figure out why. Maybe make a diagram of your suspension with measurements of arm positions and post and I will do the same. I keep telling you guys that there is differences in geometry among the models. I would like to prove it.

I saw a cat extrovert update kit installed for a 13 cat. This kit includes rails. Well they moved arm positions by well over a inch. That is huge. Poor guy just thought he was getting rid of track ratcheting but he got a whole new suspension. What if he liked it the way it was?

Obviously we are going to have to work with what we have but these geometry changes make it very difficult to use past set ups that worked. Maybe more important if using different shocks,rails,arms heck maybe even the tunnel mount holes. Measure carefully before thinking you are moving ahead. In past Yamaha shock valving pretty much sucked for most shocks but the geometry was a constant throughout almost all years and models. Ac is not doing that anymore. Why I don't know but it sucks maybe worse than bad valving.

 

[Studroes144]

I've personally trail rode an xf7000 back to back with my viper and there is a noticeable difference in the ride. This is comparing two identical models with the only difference being clutching and shock setups. Yes the cat may have a little more aggressive clutching in theory but the viper has been quicker and faster from the start so that leaves the only difference to be suspension. The cat still rode a little on the stiff side..but it only has 100 miles (buddy hardly ever rides) but as far as compression and rebound it was plush and controlled. Like I say it wasn't perfect but much better than the viper and when you would punch it and pull back the sled would dig in and go. Viper just sits on top and spins

 

[Studroes144]

I'm not saying it's not a geometry issue, just saying that with the ltx se there is def a suspension issue

 

[Ikenheimer]

Agree with Studroes-have ltx se and have had the shocks revalved-really slow compression and rebound stock. RTX seems to be different. Mine hooks pretty nice now with limiters pulled one hole down, center shock loose and front at 65 lbs. almost thinking it is oversprung too. I am 215 lbs and still have on soft-never bottomed out yet.

 

[cannondale27]

I'm not saying it's not a geometry issue, just saying that with the ltx se there is def a suspension issue

I am not saying it's geometry in your comparison either. What I am saying is there is big differences in geometry among all the models and years of pro cross chassis. BUT someone has to post valving specs for your Ltx shocks to know. We have proven a zr7000 and viper Rtx se are identical shocks. Only one way to know. Take it apart and measure. I would do it for you if you like. Just out of curiosity.

 

[vsmpowered]

speaking to hygear the torsion spring is really stiff and rear shock is valved stiff too. he put in softer spring i have couple inches of sag now but im looking in more softer spring

 

[DeerHuntr]

They are sprung incredibly stiff. I am 300#+ and haven't bottomed it out yet and I am on the lightest setting! Unheard of!

 

[drumz11]

I'm not saying it's not a geometry issue, just saying that with the ltx se there is def a suspension issue

I am not saying it's geometry in your comparison either. What I am saying is there is big differences in geometry among all the models and years of pro cross chassis. BUT someone has to post valving specs for your Ltx shocks to know. We have proven a zr7000 and viper Rtx se are identical shocks. Only one way to know. Take it apart and measure. I would do it for you if you like. Just out of curiosity.

Good point on geometry differences. This may not help viper guys but the cat ZR and XF 7000 snopros do have the same valving but different shock bodies. I'm sure it's do to shock length and skid geometry. If they followed the same recipe on the Vipers, the valving on the RTX and ltx se would be the same. Obviously the ride would be a little different due to geometry even with the same valving. I find the xf7000 Snopro not bad in the small trail bumps but gets very harsh in the rough stuff. I've ridden stiff skids in the big stuff but this setup could be improved a lot in the way it reacts so harsh.

 

[Studroes144]

I noticed the same with the xf I drove. Small bumps seemed very plush which is where the viper lacks some. Big bumps felt about the same as the viper. The xf had a lot more personality tho as it was very easy to pull front end up over the bumps