Scary handling issue - HCS Snowmobile Forums

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Unread 02-26-2019, 11:28 AM   #1 (permalink)
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Default Scary handling issue

I purchased a 2014 900ace GSX for an upgrade for my 14 year old daughters trusty 550 Super Sport M-10. The GSX has super low miles and looks like it just came off the showroom floor. It has 96 picks up the center. The sled is super quiet and smooth and handles great on the trails. If anything the steering feels a little to "low"effort. Overall very impressed and just have to get used to fly by wire throttle after a lifetime of 2 stroke's.
Now the not so good. The lake I live on has about 8" of snow over the ice and after this last little mixed bag with a little rain it has a light crust (not even strong enough to walk on without falling through. When the GSX gets out of another machines tracks into this 8" of snow it starts to get into a really bad head shake! One ski will dip down and then the other and the bars will fight back and forth. I didn't push it but it felt like if I went any faster I could get high sided off the sled! I have three other sleds and tried to see if any would do the same thing and none did so not just weird snow conditions. I have been riding for many years and have never experienced this violent head shake. In fact the closest I have ever felt it was when I almost lost it on a couple of sport bikes I had when you loose traction in both tires but the rear has more traction than the front and begins to wobble hard!! No fun.
I noticed the GSX ski's are narrower than my other sleds and obviously different but cant believe people would live with this. Has anyone run into this before? Is it a suspension set up issue? Any experience or input would be appreciated.
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Unread 02-26-2019, 11:50 AM   #2 (permalink)
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poor setup
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Unread 02-26-2019, 12:03 PM   #3 (permalink)
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Check your toe and your front shocks
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Unread 02-26-2019, 12:17 PM   #4 (permalink)
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I will look up the toe measurements for sure and check. Nothing bent/damaged in front suspension, like I said looks brand new. Thanks, any other issues you guys can or have seen that might explain this?
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Unread 02-26-2019, 12:39 PM   #5 (permalink)
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On the trails does the sled handle great?

Probably the weight of the 4 stroke motor the narrow skis plus the thin ice layer crust combination.

It would be interesting if someone in your area has the same sled to see if its the model or just your sled.
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Unread 02-26-2019, 12:48 PM   #6 (permalink)
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Quote:
Originally Posted by Fun11cat View Post
On the trails does the sled handle great?

Probably the weight of the 4 stroke motor the narrow skis plus the thin ice layer crust combination.

It would be interesting if someone in your area has the same sled to see if its the model or just your sled.

I agree it would be great to try another one and see but hard to imagine this would fly with most 900ace owners. Handles great on trail with lower steering effort than my 18 XCR Switshback 800. All I can imagine is my daughter swinging out wide in a field or clearing at speed and getting tossed
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Unread 02-26-2019, 02:07 PM   #7 (permalink)
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Quote:
Originally Posted by Fun11cat View Post
plus the thin ice layer crust combination.
Yeah, that can screw up any sleds handling. I've had perfectly set up and handling sleds almost throw me with crusty lake ice.
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Unread 02-26-2019, 02:27 PM   #8 (permalink)
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Quote:
Originally Posted by jethroxlt View Post
Yeah, that can screw up any sleds handling. I've had perfectly set up and handling sleds almost throw me with crusty lake ice.

Not much of a "crust" not even enough to keep my dogs from falling through, but you may be right. Thing is I tried three other very different sleds in same conditions/time and they rode like I would expect? In all my years of riding, I have never gotten this on or off trail before. Any other sled would have started to lean in direction of low ski and stay that way until you shifted your weight and then lean the other way, but not go back and forth.
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Unread 02-26-2019, 02:29 PM   #9 (permalink)
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I'd check ski alignment , and make sure all bushings on front suspension are in good condition, NO slop
4 stroke are sure heavier up front, so that will play into things, but I don;t think there should be head shake in a BAD way here, if other sleds riding same stuff don't have it
also, how is the wear on the carbides, does it look like its even wearing, or wearing more in the front or rear of carbide?
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Unread 02-26-2019, 05:23 PM   #10 (permalink)
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Current Sled(s): 18 800 SB XCR, 17 600 Voyager, 14 900ace
Previous Sled(s): Poo's, Doo's and Yamadogs
Location: Fayette, ME
Favorite Riding Area: Weld, Byron, Andover area
Age: 52
Riding Since: 1990
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Quote:
Originally Posted by mrbb View Post
I'd check ski alignment , and make sure all bushings on front suspension are in good condition, NO slop
4 stroke are sure heavier up front, so that will play into things, but I don;t think there should be head shake in a BAD way here, if other sleds riding same stuff don't have it
also, how is the wear on the carbides, does it look like its even wearing, or wearing more in the front or rear of carbide?

Will do, ski alignment/toe sounds high on the list. Will check entire front suspension but no kidding its like just out of the rapper LOL. Shimming the ski's on Polaris's makes a big difference in darting, are these Ski Doo's the same? Although darting isn't what concerned me.
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