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2018 sidewinder btx se clutching

Discussion in 'SideWinder Mountain Talk' started by Sidewinderbtxse, Jan 14, 2019.


  1. Sidewinderbtxse

    Sidewinderbtxse Newbie

    Messages:
    1
    Location:
    Sudbury
    Country:
    Canada
    Snowmobile:
    2018 sidewinder btx se
    hey everyone, I’m new to this site but was hoping for some help with clutching. Currently running a TD ecotrail with CAI stock primary, and 35/39 helix with stock spring wrapped at 2-6. I have blown 4 belts in 1000 miles. Looking for better back shifting/throttle response and cooler clutch temps. Would like for this sled to wheelie yet still be fast on the lake. Thanks in advance
     
  2.  
  3. minks_698

    minks_698 Pro

    Messages:
    125
    Location:
    Wisconsin Rapids
    Country:
    USA
    Snowmobile:
    2016 Viper MTX 141
    Before i start a new thread, your not alone. Im experiencing the same issues blowing belts on a 17 BTX LE with the 2.25. I could blow a belt everyday if riding hard in deep snow. My secondary offset is 60mm, middle of spec.
    Sled has stock tune, good primary and secondary rollers, orange TP secondary spring wrapped at 70 deg. 33-35 helix.

    The clutches get so hot, i cant touch em. Gotta be belt slip? Its absolutely ridiculous i cant ride a 153x2.25 in its intended environment .
    Might try more twist on secondary for now, maybe add venting to bandaid temps.
    Anyone got some suggestions? Dont care about your trail setups , trail it seems fine. Do i need a full MTX clutch setup?
     
    farmerschiferl likes this.
  4. farmerschiferl

    farmerschiferl Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    321
    Location:
    Hewitt,WI 54441
    Country:
    USA
    Snowmobile:
    2017 Yamaha Sidewinder BTX-LE
    venting will definitely help, have you tried it with the new ultimax belt herd those are supposed to be stronger haven't tried on mine yet. I have the same sled as you but with a tune with TP clutching and i eat belts going to recheck offset this week.
     
  5. kinger

    kinger VIP Member VIP Member

    Messages:
    6,210
    Location:
    Clear Lake, IA
    Stupid question from newbie owner of same sled. Where are the spare belts on the sled? I took it for a trip this weekend and realized I never even had a belt with me?! I thought it would have one from factory.

    Back to your question, Mine is a new 17 carry over I got in March of last year. I rode it 181 miles bone stock in deep snow from some freak snow storms in April. Clutches were hot. Over summer sent to Ulmer for 270 tune, clutch, and dyno. He machined 1.5MM off the secondary to get it to align properly. Then installed his kit and ran it 200 miles over the last week and clutches were always warm but never hot now. I have never blown a belt but only have 388 miles on sled.
     
  6. farmerschiferl

    farmerschiferl Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    321
    Location:
    Hewitt,WI 54441
    Country:
    USA
    Snowmobile:
    2017 Yamaha Sidewinder BTX-LE
    No spare belt from the factory lol some dealers will give you one when you buy the sled. Most store theirs in the tunnel bag or on top of the clutch gaurd
     
  7. minks_698

    minks_698 Pro

    Messages:
    125
    Location:
    Wisconsin Rapids
    Country:
    USA
    Snowmobile:
    2016 Viper MTX 141

    I have only tried the stock 8jp belt. Thought about trying an 8dn, but the harder compound will likely raise rpm, and ive added 4.5g to the stock weights above factory setting and she still revs way too high - near 9200. 1100 miles and a 2.5" trail muffler.
    Which ultimax belt do you suggest and how much $$$?
     
  8. farmerschiferl

    farmerschiferl Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    321
    Location:
    Hewitt,WI 54441
    Country:
    USA
    Snowmobile:
    2017 Yamaha Sidewinder BTX-LE
    I'm not a clutching expert to be honest but a ultimax xs825 is probably the best replacement for the 8jp right now Denis Kirk sells them for $120.80 probably can find them for less on ebay.
     

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