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LTX 137 lack of transfer..Reasoning/Solution?

Discussion in 'SideWinder Trail Talk' started by hibshman25, Dec 2, 2017.

  1. hibshman25

    hibshman25 Vendor Vendor VIP Member

    Messages:
    1,667
    Location:
    Lebanon, PA 17042
    Country:
    USA
    Snowmobile:
    2017 sidewinder ltx dx
    2018 snoscoot
    Lots of talk on lack of transfer on 137 vs 129, so I started looking into this myself. I've got 129 and 137 skids and tunnels side by side and started working through them to compare.

    The most notable difference is that rear mount of a 137 skid is farther back on the tunnel, so in turn the rear skid arms are farther back on the rails. This changes the distribution of rider weight and I feel could be the reason for lack of transfer.

    For an easy analogy think of a single axle trailer. Think of the weight on the skis as tongue weight. Rider is the load on trailer, and the rear skid mounting point is the axle of trailer. The position of rider weight/load is constant between a 129/137 so if you move the rear mounting point/axle farther back like on the 137 there is less weight available on the axle as more of the rider weight is being distributed across the skis/tongue.

    With less weight beings distributed across the rear of a 137 skid, to me it makes perfect sense that a 129 transfers better than a 137 when both are sprung with the same rate torsion spring. With less weight available to counter the spring force, I'm thinking that a 137 should come equipped with a lighter spring rate than a 129.

    I've been told that there actually is no lighter spring rate available and for me at 210 lbs I can't even get much sit in with the adjuster blocks on the softest setting. I have a friend that just bought an LTX, and at 140lbs the sled is not going squat at all when he gets on the gas! I think I have a solution which utilizes the stock springs....and hope to test it soon. Just wanted to post my thoughts to see what others think.
     
  2.  
  3. krm

    krm TY 4 Stroke Junkie

    Messages:
    560
    Location:
    ny
    Country:
    USA
    Snowmobile:
    sidewinder 850 mxz,800 xrs
    Just move the bottom of the rear sissor forward .
     
    jtmetal and cannondale27 like this.
  4. burlyviper

    burlyviper VIP Member VIP Member

    Messages:
    140
    Location:
    Ottawa Lake MI
    Country:
    USA
    Snowmobile:
    2018 Sidewinder LTX LE, blue
    2011 Apex 128, Ulmer Airbox and clutch kit, PCV, HID
    2008 Phazer RTX
    1980 Exciter 300
    Hygear has a replacement spring but its pricey at $160. I weigh 170 and I have sit in on my new LTX LE with the shocks set on soft. I'd be interested to know of another solution.
     
  5. jtmetal

    jtmetal TY 4 Stroke Guru

    Messages:
    936
    Location:
    Northern Illinois
    Country:
    USA
    Snowmobile:
    '17 Sidewinder LTX SE
    I think my Sidewinder is not sprung correctly. I go 195lbs with sled set on soft. Has such little give.

    Last year I rode someone on back for 10miles. Rear suspension seemed more at home with the extra weight. and never bottomed out.

    Just adding my thoughts.
     
    stevewithOCD likes this.
  6. cannondale27

    cannondale27 Moderator Staff Member Moderator Vendor Lifetime VIP Member VIP Member

    Messages:
    14,627
    Location:
    Manitowoc,WI
    Me too. No room on 129 to move arm forward big cut out where needed and 137 I think has hole there too. Go for it Travis. Do it for 129 too though.
     
  7. hibshman25

    hibshman25 Vendor Vendor VIP Member

    Messages:
    1,667
    Location:
    Lebanon, PA 17042
    Country:
    USA
    Snowmobile:
    2017 sidewinder ltx dx
    2018 snoscoot

    Feedback is what I'm looking for! I am in same boat..... have very little give with my LTX DX
     
    jtmetal likes this.
  8. stevewithOCD

    stevewithOCD Beerman Wannabe Lifetime VIP Member

    Messages:
    1,535
    Location:
    live in CT sled in Millinocket MAINE
    Country:
    USA
    Snowmobile:
    2017 Sidewinder LTX-LE
    Yes, mine rode better with another person on back also.
     
  9. stevewithOCD

    stevewithOCD Beerman Wannabe Lifetime VIP Member

    Messages:
    1,535
    Location:
    live in CT sled in Millinocket MAINE
    Country:
    USA
    Snowmobile:
    2017 Sidewinder LTX-LE
    I think the Hygear spring is not softer, just bent on end. I bought one & will know first ride if it works.
     
  10. stevewithOCD

    stevewithOCD Beerman Wannabe Lifetime VIP Member

    Messages:
    1,535
    Location:
    live in CT sled in Millinocket MAINE
    Country:
    USA
    Snowmobile:
    2017 Sidewinder LTX-LE
    Is it that simple? Has someone tried this? Sometimes changing geometry even a tad can make the ride suffer.

    YES Travis, I am interested in seeing what you come up with.
     
  11. Bt04f250

    Bt04f250 Extreme

    Messages:
    67
    Location:
    IL
    Country:
    USA
    Snowmobile:
    2018 sidewinder xtx 137 high Vis ordered 2012 Polaris rush pro r Le
    I am correct that anything discussed here would also apply to my xtx 137
     
  12. hibshman25

    hibshman25 Vendor Vendor VIP Member

    Messages:
    1,667
    Location:
    Lebanon, PA 17042
    Country:
    USA
    Snowmobile:
    2017 sidewinder ltx dx
    2018 snoscoot

    Does the xtx 137 skid have torsion springs?
     
  13. actionjack

    actionjack TY 4 Stroke God

    Messages:
    1,815
    Location:
    Westminster, Maryland
    Country:
    USA
    Snowmobile:
    2017 SideWinder LTX-LE
    VX1R stated a while ago that he got a softer torsion spring from Hygear and that made a difference. Been meaning to call Hygear about this because their website is vague about the spring rate comparison to stock. I think my sled rides great but do want to be able to unweight the skis at will.
     
    Last edited: Dec 3, 2017
  14. actionjack

    actionjack TY 4 Stroke God

    Messages:
    1,815
    Location:
    Westminster, Maryland
    Country:
    USA
    Snowmobile:
    2017 SideWinder LTX-LE
    Prettt sure same coupled skid
     
    Last edited: Dec 3, 2017
  15. Bt04f250

    Bt04f250 Extreme

    Messages:
    67
    Location:
    IL
    Country:
    USA
    Snowmobile:
    2018 sidewinder xtx 137 high Vis ordered 2012 Polaris rush pro r Le
    Yes it does. Torsion springs, qs3 rear shock and a coil over hpg front skid
     
  16. **sj**

    **sj** Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    5,516
    Location:
    southeastern Mich
    Country:
    USA
    Snowmobile:
    2017 sidewinder ltx-le

    this....travis...like we discussed....the change in the skids geometry (thanks cannondale) after my 12' procross and the 13 year...14' moved the bottom of the scissor vertical ....where in the 12 and 13 year the bottom was an inch forward ...pre sagging or setting into the preload of the spring and shock (set in) ...the previous version came with a 18.5 lb spring...with the optional spring being a 16.5 lbs spring....guess what...the stock spring now is the optional 16.5 spring! so the solution is exactly what I told you...

    yes there are different upper mounting spots on the 129 vs 137 ...and that does reveal a slightly better transfer...but the real soluion is recreating the set in the genius's at cat took away!
     
    krm and cannondale27 like this.

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