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2012 venture GT eating belts

Discussion in 'Engine & Clutching' started by ksblock, Mar 22, 2019.


  1. ksblock

    ksblock Newbie

    Messages:
    2
    Location:
    MN
    Country:
    USA
    Snowmobile:
    2012 rsventureGT
    Hello,
    So we own a 2012 venture GT, We purchased the sled with 300 miles on it and I noticed the spare belt was gone when purchased. The guy we bought it from played dumb. Long story short 1100 miles now and burned 3 belts. when driven under a normal load this thing will over heat belts in a hurry, It will delaminate the top of the belt and have the swirl marks on the side. Just by eyeball the alignment looks good, Ive messed with belt deflection and it seems to make little to no difference on belt life. Ive inspected the primary and secondary clutch for anomalies and find none. I did replace the primary spring with a "soft start spring" and this had no affect on belt life. I also tightened the secondary spring up by one number with no improvement.

    Looking for a little help, What is the center to center suppose to be on the sheaves? Is there a red neck alignment bar or way to check this other then eyeball? Can someone please explain the adjustments on secondary ( 1234 and the ABC)? Id really like to increase clamping pressure but am not complety sure on what setting to try. is this a common issue with these sleds? Any and all info will be greatly appreciated..
     
  2.  

  3. maim

    maim Moderator Staff Member Moderator Lifetime VIP Member VIP Member

    Messages:
    5,692
    Location:
    sudbury on
    Country:
    Canada
    Snowmobile:
    2016 apex xtx/ 2011 apex xtx/ 2009 phaser rtx/x/ 1997 et410t/r
    brother had the same issue on his 2013 rs venture gt. we ended up clutching the sled for more snap/low end belt grip and it has been good so far. they clutch them very soft for comfort from the factory and odds are the belt just slipped itself to death in the primary. need to replace the weights in his as we got someones drag race weights and it is causing issues on decel if you do not pay attention to it. i hate a sled that when you punch it, it makes noise only and nothing happens.
     
  4. ksblock

    ksblock Newbie

    Messages:
    2
    Location:
    MN
    Country:
    USA
    Snowmobile:
    2012 rsventureGT
    Couldn't a guy continue to tighten secondary spring to achieve more clamping pressure?
     
  5. maim

    maim Moderator Staff Member Moderator Lifetime VIP Member VIP Member

    Messages:
    5,692
    Location:
    sudbury on
    Country:
    Canada
    Snowmobile:
    2016 apex xtx/ 2011 apex xtx/ 2009 phaser rtx/x/ 1997 et410t/r
    no as the belt is slipping in the primary. how are the clutch temps while riding? bet the primary is smoking hot.
     
  6. Wobbie

    Wobbie Newbie

    Messages:
    9
    Location:
    Braeside
    Country:
    Canada
    Snowmobile:
    15 Vector
    My inner child wanted to tell you to release the parking brake. Sorry, couldn't resist.

    Any luck on resolving this? My first thought was that it might be the secondary twist angle. The sheet I have (not for the '12 model year) shows the Vector at 70 degrees (Sheave at 1 and seat at 6), the Venture gets 60 degrees (sheave at 3 and seat at 3). I have been thing about trying the 60 degrees on my Vector to see if it might reduce the engine braking.

    The other thing would be alignment. Again, this is not for your model year but I suspect they are pretty much the same...

    Belt.JPG
    You adjust offset by adding or removing shims (washers but special - specific thickness and flatness).

    Also, there should be some free play of 1 to 2 mm. The precise dimensions of the straight edge aren't critical, basically something that is flat and will fit. I am new to the Yamaha thing and was surprised to see the "slop" on the secondary, but as I think about it, it lets the secondary find it's happy place without too much lateral deflection. Mine has probably over 2 mm.

    Hope you already have it figured out - if not I hope this helps.
     
  7. yamadoo

    yamadoo Yamadoo is a snowmobile ' aholic'. Lifetime VIP Member VIP Member

    Messages:
    3,281
    Location:
    SE MN work North shore Superior play
    Country:
    USA
    Snowmobile:
    15 Viper STX DX red/white
    13 Apex XTX 45 anniversary RED/WHITE/BLACK
    10 Vector LTX Blue
    11 Venture Gt
    86 SnoScoot(2) for grand kids
    I have the 11 Venture GT and still on original belt, also rode with friend with a 12 and neither have replaced a belt, my point is NOT a machine charactoristic
    Good luck
     

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