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Rear of sled severe sag...... Pls help

Discussion in 'SideWinder Trail Talk' started by JayM, Jan 3, 2020.


  1. JayM

    JayM Expert

    Messages:
    431
    Location:
    Pickering, ON
    Country:
    Canada
    Snowmobile:
    2017 Sidewinder R-TX SE
    (Background, had the skid out this fall, re-greased everything, shocks rebuilt as well and had the suspension setup by a suspension pro. RR upper shaft installed too.)

    On my '17 R-TX-SE I noticed today while getting gas after riding some very rough trails in Cochrane aggressively fast that my snow flap was very close to toughing the ground probbaly half way compared to normal. I pushed down on the rear and there was still some travel and rebound but only to the same halfway point. If I pulled up on the rear there was about 4-5 inches of sag to gain. When I had the sled setup we did 3" of sag total with me sitting on the machine.

    I tried my torsion springs on 3, still no difference which is weird as the torsion springs should set my ride height/sag.

    All appears to look normal under there, I thought I had a blown rear shock but my shock guy said it wouldn't really help hold the rear up at all.

    For all intents and purposes, it's riding great still, and these trails are ROUGH! Sometimes when I came to a stop it is at the top as it should but most times it's in that half way down position.

    Any advice? I can take a video in the morning
     
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  3. vmxrdr

    vmxrdr Veteran

    Messages:
    38
    Crappy luck for your ride, buddies told us it got crazy rough over to Hearst. Unless something broke in your skid sounds like you may have lost your gas charge in shock? Or at least part of it. You mentioned fresh overhaul on shocks which should have prevented that.
    Hopefully you can finish ride okay.
     
  4. JayM

    JayM Expert

    Messages:
    431
    Location:
    Pickering, ON
    Country:
    Canada
    Snowmobile:
    2017 Sidewinder R-TX SE
    Smooth Rock Falls to Cochrane was 50km of huge moguls, it as terrible, never seen worse!

    I'm going to monitor again today and take pics and post an update. I will take the skid out when I get home and check it all out and have the shocks looked at too.
     
  5. Pstn head

    Pstn head VIP Member VIP Member

    Messages:
    1,163
    Location:
    Ontario, Canada
    Check it on a flat surface like concrete or asphalt. That'll give you a better idea of what's going on.
     
  6. DMCTurbo

    DMCTurbo VIP Member VIP Member

    Messages:
    1,746
    Location:
    Val Caron
    Country:
    Canada
    Snowmobile:
    2017 Sidewinder XTX LE 137
    Glad I didn’t head up there this weekend. Hope you figure out what’s going on.
     
  7. jonlafon1

    jonlafon1 TY 4 Stroke God

    Messages:
    1,607
    Location:
    Mount Morris, WI
    Country:
    USA
    Snowmobile:
    Sidewinder LTX-SE
    Blown shock seal?
     
  8. Sledroll

    Sledroll TY 4 Stroke Junkie

    Messages:
    735
    Location:
    Muskoka , Ontario
    Country:
    Canada
    Snowmobile:
    2015 Apex XTX
    2017 SW LTX LE
    I have the same issues at times with both my previous Apex , even with the Star kit , and now with the SW.
    Just ordered the 5 sided cam adjuster from Star , and am going to drop the sled off at my shock guy , who serviced the shocks late ly.
     
  9. WinterWolf

    WinterWolf TY 4 Stroke Master

    Messages:
    1,043
    Location:
    Connecticut
    Country:
    USA
    Snowmobile:
    "2018 Yamaha Sidewinder RTX LE 50th Anniversary Edition"
    Sometimes it gets so loaded with snow and ice and that can compress it down some...especially after hammering on it through the rough. I’ve seen this in my Apex and previous sleds. So far haven’t really seen it on my Winder. I know it’s a simple idea..but sometimes thats all it is...especially if it’s still riding Fine as you say.
     
    cannondale27 likes this.
  10. JayM

    JayM Expert

    Messages:
    431
    Location:
    Pickering, ON
    Country:
    Canada
    Snowmobile:
    2017 Sidewinder R-TX SE
    So I rode 250km today, I even put my torsion springs back on 2 and it rode amazing. Half the time I stopped it was "sagged down" a bunch and the other half it was fine. And it was pretty much all flat terrain, so weird.
     
  11. WinterWolf

    WinterWolf TY 4 Stroke Master

    Messages:
    1,043
    Location:
    Connecticut
    Country:
    USA
    Snowmobile:
    "2018 Yamaha Sidewinder RTX LE 50th Anniversary Edition"
    Honestly I think it’s the snow and ice in there that sometimes seems to compress it some...?
     
  12. Fleecer

    Fleecer Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    633
    Country:
    USA
    Snowmobile:
    Yamaha Apex MTX
    This is odd for sure. Do you have the rear coupler blocks and/or rod removed?
     
  13. Crossfire12

    Crossfire12 TY 4 Stroke Junkie

    Messages:
    563
    Location:
    New York Adirondacks
    Country:
    USA
    Snowmobile:
    2017 zr9000,F1100 turbo, 700 srx
    LOCATION:
    Sacandaga reservoir
    Frozen shock??
     
  14. JayM

    JayM Expert

    Messages:
    431
    Location:
    Pickering, ON
    Country:
    Canada
    Snowmobile:
    2017 Sidewinder R-TX SE
    Another 200km this morning before heading home and I put the Torsions back to 1 (that's where we had them when I had the suspension setup) and she rode like a dream! Still half and half with the rear sag. Got home late so this week will pull thr skid and check things out and report back.

    I have a few posts I need to make this week too, on the Elka Dual springs I had out on my revalved SE front and middle shocks amd on the CV-Tech PB80 I installed for this season. Have 1500km on them now this season so have a good grasp on how it is compared to stock.
     
    yamamarc likes this.
  15. yamamarc

    yamamarc TY 4 Stroke God

    Messages:
    2,005
    Location:
    ontario
    Country:
    Canada
    Snowmobile:
    2014 viper rtx se
    2014 zr 7000ltd
    I bet Cochrane was crazy this weekend eh!!
    Trail around here(Sudbury area) should be opening this week with all the snow in forcast
     
  16. Sledroll

    Sledroll TY 4 Stroke Junkie

    Messages:
    735
    Location:
    Muskoka , Ontario
    Country:
    Canada
    Snowmobile:
    2015 Apex XTX
    2017 SW LTX LE
    I trailered to IMG_1127.jpg Capreol for the day , and rode C to Shining Tree .
    first 3rd of the trail was rough , but from this point on almost all fresh groomed .
    Passed a groomer on the red part , should be a lot of trails open this week .
     
    yamamarc likes this.

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