1. We are no longer supporting TapaTalk as a mobile app for our sites. The TapaTalk App has many issues with speed on our server as well as security holes that leave us vulnerable to attacks and spammers.
    Dismiss Notice

Better Understanding of Todays Track Lengths

Discussion in 'General Yamaha Discussion' started by Port-Parts, Apr 2, 2016.

  1. Sidewinder

    Sidewinder TY 4 Stroke Junkie

    Messages:
    545
    Location:
    Ontario Canada
    Country:
    Canada
    Snowmobile:
    2017 Yamaha Sidewinder LTX LE
    LOCATION:
    Waterloo
    WEBSITE:
    www.streettechracing.com
    UGHHHHHHHHHHHHHHHHHHHHHHHHHH , Im so confused .
    Jim make 100% sense with the 40% of track on the ground , I agree 100% with this .
    The weight to power ratio I get , being a drag racer I know this stuff .
    I understand turbos again drag racer . as well I have a chassis dyno so I understand power ad how to make it .
    I just dont understand how guy claim that a 137" track can out MPH a 129 with the same HP and gearing .
    Dont give me the 2 lugs more stuff , I dont see it making all that much of the difference , Ill be studding my sled either the 129 or 137"

    As a ONLY trail rider and tight corners here in this area and some lakes when we go north the choice is hard .
    I Dont go off trail , the only time last winter I went off trail with my Apex was to take a leak , when going back to the trail I followed another set of tracks , BAD IDEA , I hit a white trailer buried in the snow , cost me 1000. to fix the sled to go back out riding 1 more time , thats one expensive piss .
    A arms , Carbide , bulkhead repair kit from Barn Of Parts and bolts .
    I like to ride fast , when on the lakes we kill it , we have both ran in radar runs her 03 rev 113.7 in 2000 ft , my Apex 118.3 in 2000 ft with my fat butt on it .

    I had the 14 Viper I bought in January 137" track , not fast enough , 85mph stock , 90+ with the 8DN belt only on it , TERD.
    It didnt corner bad I guess , it turned better than my 121 Apex , but that was really nose heavy , 2006 RTX , fast but it would give you a good workout in the twisties .

    I have a few more days to figure it out , or Ill just call the dealer and say " surprise me "
     
    bleedyamaha likes this.
  2. Pstn head

    Pstn head VIP Member VIP Member

    Messages:
    978
    Location:
    Ontario, Canada

    I beilieve you'd be happier with the short track, 129" I still think the shorter the track the better for the twisty's like Muskoka, Barrie, etc. ( I assume those areas being your location Ontario) On the lakes and up North so what if it's a "few mph slower" than the 137", just think you'll get to lake before your buddies so you'll have to wait for them anyway. Lol! Just my 2cents
     
  3. cannondale27

    cannondale27 Moderator Staff Member Moderator Vendor Lifetime VIP Member VIP Member

    Messages:
    15,776
    Location:
    Manitowoc,WI
    I have not seen the faster 137's or 141's on the Vipers at least on snow since they are snowmobiles. I tend to agree with JimD especially since I own a 129! Many have heard the tale. Last winter about 10 of us Viper owners went to Wausau. Various length sleds 129,141,137 all had various bolt on mods. ALL went 101mph or within 1 or 2 of it. Freakiest thing I have ever seen. Actually thought there was some type of speed limiter on the sleds. It was just conditions and maybe the sled itself . Conditions have more bearing on speed than almost anything. The more power you have the higher the speed conditions determine the speed but it will be the conditions outside that determine the speed eventually Everytime. Be it wind,snow,ice,grass or even gravity.
     
    Turtle, uprider800 and greatwhite89 like this.
  4. uprider800

    uprider800 Expert

    Messages:
    262
    Location:
    winneconne wi
    Country:
    USA
    Snowmobile:
    Arctic Cat xf 9000
    Here is my take. If you ride big trails or are a trail cruiser get the 137. If you run tighter trails or want to ride more aggressive and enjoy the fun factor of more transfer get the 129. If I didn't ride with the guys I would stick with the 137 because the stability is awesome. Plus just cruising in tight woods isn't a problem with the 137. Maybe I'm just trying to fight off farther time and thinking I can still ride somewhat aggressive. I figure I will give the 129 a shot.
     
  5. SRXracer

    SRXracer Expert

    Messages:
    265
    Location:
    Zeeland, Mi
    Just measured my 137". from the center of the front wheel on the rail to the center of the rear axle is only about 36". That is actually only about 26% of the track on the ground for the 137. But, assuming the front wheel on the rail stays in the same spot, pretty much 50% of the additional length from 128 to 137 or whatever length the track is would be added because you are basically adding the length to the two portions of the track that are parallel to the ground - i think.

    Also, FWIW, one of the yamaha techs at the show said the bigger the circle of the track (length), the less resistance it has to rotating, and would be faster. Personally, in the real world, I think there are way to many variables for one thing to be the controlling factor.
     
    cannondale27 likes this.
  6. Mike P

    Mike P Expert

    Messages:
    244
    Location:
    Berlin CT
    Country:
    USA
    Snowmobile:
    Sr Viper R-TX SE
    LOCATION:
    Berlin CT
    I find "conditions" to be the equalizer, "rider ability" to be the multiplier and "mods" to be the advantage.
     
    cannondale27 likes this.
  7. Sasquatch

    Sasquatch Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    3,315
    Location:
    North Western Ontario
    Country:
    Canada
    Snowmobile:
    Yamaha's
    Curious as the tipped rail lifts the last 5 or 6 lugs off the ground so 16.62 or the same as a 121. Don't see the 146 being less then the tipped 144
     
  8. 03viperguy

    03viperguy VIP Member VIP Member

    Messages:
    111
    Location:
    Alton, NH
    nice valuable info right there, awesome!
     
  9. Blueaway

    Blueaway Lifetime Member Lifetime VIP Member VIP Member

    Messages:
    100
    Location:
    Alliston
    Country:
    Canada
    Snowmobile:
    2017 sidewinder
    Thanks for all the info everyone . I was a little worried about my decision on a 129.sidewinder. You made me feel way better I do most of my riding on tight twisty trails. That's why I picked a 129
     
  10. RJH

    RJH TY 4 Stroke Junkie

    Messages:
    626
    Location:
    Muskoka
    UPrider..a longer front arm takes away leverage..of lifting the skis ..so...less power pushing down.at the point the where the arm is connected to the rails

    So..if it was an oval sled..the front skid would suck up faster when you let off..push harder when you are on it
     
    Last edited: Nov 23, 2016
  11. RJH

    RJH TY 4 Stroke Junkie

    Messages:
    626
    Location:
    Muskoka
    Jim..one of the biggest factors today ..as all tracks are turds today.... is track pitch...less turning drag..that is track turning

    My old Ti coated cleated tracks weighed about 12 pounds..



     
  12. RJH

    RJH TY 4 Stroke Junkie

    Messages:
    626
    Location:
    Muskoka
    Port parts..stunning wealth of information..

    You see I am just happy with my 99 Phazer and my flip phone. But we moved into smartphones as the era of apps and control fascinated me..we even control our other land phones with it today.

    Similarly, I am getting left behind with 4/ technology so I spent all summer nagging YMC for a sled deal..on that note we all met at Bracebridge Yamaha and we worked out a deal.

    In sno-x I have pushed for long tracks so I wanted a 137..well in the end to make things work I took a 147..XTX..(with a low windshield).

    Your information really helped to answer many questons..

    At what angle does the 147 come off the drive compared to the 129?
     
  13. RJH

    RJH TY 4 Stroke Junkie

    Messages:
    626
    Location:
    Muskoka
    Did Yamaha tighen up the clutching for the 147 or is it the same as the 129.
     
  14. blueironranger

    blueironranger TY 4 Stroke God

    Messages:
    1,627
    Location:
    Iron Range MN
    Country:
    USA
    Snowmobile:
    2014 Viper XTX
    2009 Phazer MTX
    I like the tipped rails on my 144" Phazer, seems to corner just as good as any 121 phazer and I definitely have a traction advantage. The tip up on mine is equivalent to ~128" track on the ground.
     
  15. Kkurz

    Kkurz Pro

    Messages:
    195
    Location:
    Peterborough On.
    Country:
    Canada
    Snowmobile:
    2014 XF7000 Sno-Pro Limited
    (Yamaha powered)
    Cannondale, does that mean I can take the transfer block/bar assembly right out and not chew my track up? I did in my 136" Nytro and it was the ticket. I bought the 137" for fun off trail but transfer on trail is fun!
    Thanks, Kevin.
     

Share This Page


  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice