Switch from stock skis with deuce bars to Curve skis with not good results

[csederlund]

I have 6" round bars on my curves with the 2" leading edge and can ride with one hand at 70. To me they are very stable and on rails.

 

[powerguy1]

I have 6" round bars on my curves with the 2" leading edge and can ride with one hand at 70. To me they are very stable and on rails.

How do you have you rear suspension and fox floats set? Ski toe? Your experience is what I expected with the curves. Did you try them without the leading edge?

 

[csederlund]

Floats I have 70lbs. but I also have Hygear's dual pressure kit. Center shock a little preload, didn't measure. I went by Curve's instruction and 1/8" or so. Torsion spring is set at soft. I didn't try without leading edge.

 

[Grimm]

Have you shimmed the skis yet?
http://www.totallyamaha.com/snowmobiles/aaTECH/Ski_Alignment/Ski_Bumber_Shim.htm

 

[powerguy1]

I have the next larger rear springs (1704-560/561) on the lightest setting. Other settings for center shock and rear shock are stock (as far as I know). Wondering if I have too much weight on the front skis and with the more aggressive Curves the skis are finding every rut and tracking them and causing the darting and overall twitchyness of the sled.

Does anyone here know the difference between the spring force of the stock LTX rear springs at cam setting #3 and the larger spring rate springs that I have at cam setting #1?

 

[mtotguy]

Have you shimmed the skis yet?
http://www.totallyamaha.com/snowmobiles/aaTECH/Ski_Alignment/Ski_Bumber_Shim.htm

I can't tell from the photos if the shim goes on the front side of the bumper or the rear.

 

[TD Max]

Shim is on the rear side of the spindle. The idea is to create more downforce behind the spindle and try to get the front of the bar to ride up out of ruts etc.

 

[mtotguy]

Shim is on the rear side of the spindle. The idea is to create more downforce behind the spindle and try to get the front of the bar to ride up out of ruts etc.

Yep. That is how I had my stock skis shimmed on my Nytro and it helped. But when I put tuners on it the shims in the rear seemed to make it dart worse.

 

[Grimm]

You actually have to look at how the runners sit on the ground. You want to shim the skis so that the front of the carbide is raised off the ground...essentially rear weight biased. This way, the runners aren't being driven down into the snow and "hunting" for an easier path, ie. previous tracks.