suggestion for those with darting issues that you cant cure!

[Iceman57]

With all of my sleds, whether it’s a 2 or 4 stroke, when the skis lift off the snow, the right one always comes up first. Sometimes when checking my hole shot, I can see that only the right ski has left the snow from the tracks left behind. When I lift both skis the sled always pulls somewhat to the left. Maybe I’m dead wrong, but I always assumed it was from engine torque combined with the clutching on the left side of the sled.

 

[yamadoo]

Craze and LB great civil physics debate and I feel strongly both ways. HA HA LOve the physics link.

Where I / we get in trouble often is as'sledheads' we use physics terms losely, ie power, torque, work etc. When in fact they are very specific and often different from what we are 'talking about'.

Good fun thinking.

Yamadoo

 

[welterracer]

Re: suggestion for those with darting issues that you cant c

while working on my attak and generally thinking too much i thought of this. the apex's dont have nearly as much caster as many other sleds. looking at my viper, attak and pro x i noticed the less caster the more darting. it also goes like that in cars. more caster = better stability. a lot of toyota trucks with braking vibrations are fixed when caster is added. the only easy way i thought of to fix this is to unbolt the upper a arm from the spindle. there are washers between the spindle and a arm. remove the rear one and install it in the front (so that there is 2 in the front and none in the rear. as long as it bolts up like this it will add a couple degrees of caster and i can almost gurantee it will reduce darting (espically under braking!).

I agree, they need more caster... it would definitly make it steer easier at higher speeds and also help it drive in a strait line easier..

Instead of redesining the sled i just went out and purchased a set of Skidoo pilot skis.. ( i did the shimming.. Helped but didnt cure the problem)

 

[n2oiroc]

another way to get more caster is to put a long pipe through the a arms and pull back! wait, dont do that! lol!

 

[LJ 452]

Has anyone checked to see what the weight dispersion of the sled is? By that I mean how much of the sleds total weight is transfered to the left ski, right ski, and of coarse the track. With my calculated eye and just looking at the engine compartment I would gues that the left side would weight more due to the clutches and the moment at which they are mounted. As opposed to the chaincase which is fairly tight to the block. As I stated just by eyeing it, thats how I see it. Plus weren't the Fox Floats showing different psi once the sled was lowered to the ground?
This would indicate a difference in weight distribution from left to right. I don't even know why this is a problem? But I'm confident that the solution to the question is snow and lots of it.


LJ

 

[n2oiroc]

Has anyone checked to see what the weight dispersion of the sled is? By that I mean how much of the sleds total weight is transfered to the left ski, right ski, and of coarse the track. With my calculated eye and just looking at the engine compartment I would gues that the left side would weight more due to the clutches and the moment at which they are mounted. As opposed to the chaincase which is fairly tight to the block. As I stated just by eyeing it, thats how I see it. Plus weren't the Fox Floats showing different psi once the sled was lowered to the ground?
This would indicate a difference in weight distribution from left to right. I don't even know why this is a problem? But I'm confident that the solution to the question is snow and lots of it.


LJ

im sure its very close side to side. remember the oil tank is on the right side along with all the brake components.

 

[mdkuni]

This summer I want to make sure my suspension is square (parallel to the ski spindles) Reason is when I wheelie, the sled pulls to one side.

My Apex does the same thing. Mine pulls to the right. I have no studs.