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17' Jackshaft Upgrade

Discussion in 'SR Viper Talk' started by DTJ, May 20, 2019.


  1. DTJ

    DTJ Extreme

    Messages:
    54
    Location:
    Brainerd, MN
    Country:
    USA
    Snowmobile:
    2014 Yamaha Viper XTX
    2013 Yamaha Apex XTX
    Just finished upgrading my 14' XTX jack shaft to the 17' jack shaft and bearing. I had just over 9,000 miles on the original bearings and figured it's time to do the upgrade. Everything was original in the chain case except for the upper gear bushing. I found a jack shaft off a low mileage wrecked Sidewinder super cheap and ordered the rest of the parts from Yamaha. The job really wasn't to bad. I couldn't get the threaded collar to break loose under the gear so I used Cannondale's recommendation of using a bearing puller on the clutch side to pull the bearing and aluminum support first and then tap the bearing out the chain case side with the shaft. The only thing that's different with the newer 17' setup is as far as I could tell is the bearing is narrower which requires coming up with a spacer to add to the bearing housing to make up for the extra 4mm gap. I found a couple of large c-clips at the hardware store that fit. Really the only reason you need them would be if the bearing ended up moving over in the housing. Other than that everything assembled and seemed to line up just the same as the 14' setup except this new setup up will be a lot easier to change bearings when the time comes. I've attached pics of the 14 and 17 shaft lined up, the parts I replaced, the c-clips I used as spacers in bearing housing and the assembled unit.
     

    Attached Files:

    cannondale27 and Pstn head like this.
  2.  
  3. Mike P

    Mike P Expert

    Messages:
    424
    Location:
    Berlin CT
    Country:
    USA
    Snowmobile:
    Sr Viper R-TX SE
    LOCATION:
    Berlin CT
    Looks nice.
     
  4. cannondale27

    cannondale27 Moderator Staff Member Moderator Vendor Lifetime VIP Member VIP Member

    Messages:
    18,017
    Location:
    Manitowoc,WI
    Awesome! Good to know it all fits. Thank you
     
  5. DTJ

    DTJ Extreme

    Messages:
    54
    Location:
    Brainerd, MN
    Country:
    USA
    Snowmobile:
    2014 Yamaha Viper XTX
    2013 Yamaha Apex XTX
    It actually helped a lot having a used jack shaft. I was able to see where the seal, bearings and gear rode on the new jack shaft and verify with old shaft that everything would align before assembling.
     
    cannondale27 likes this.

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